Earth

Earth is a terrestrial world and the third planet in the Solar System. It is the homeworld of humanity, although it has been inhabited and ruled by numerous other species across time as well.

Over the course of Earth's history, the planet has been colonized by several extraterrestrial races that struggled with each other for dominance, including the Elder Things, the Cthulhi, the Great Race of Yith, the Flying Polyps, and the Mi-go, as each held some territory on Earth for a time. (HPL: At the Mountains of Madness, The Shadow Out of Time)

History[]

At some point in time, Yog-Sothoth's species, which the Necronomicon refers to as the "Old Ones", ruled over the Earth. (HPL: "The Dunwich Horror")

According to the history presented in the Unaussprechlichen Kulten, the Earth was originally located in another dimension and ruled by the Elder Gods, who created the Old Ones as their slaves, the first two of which were Azathoth and Ubbo-Sathla. Eventually, the Old Ones rebelled against their masters, and in the ensuing conflict, the Earth was plunged into our universe. (EXP: "The Horror in the Gallery")

Prehistory[]

Shortly after Earth's formation four and a half billion years ago, Cthugha and the Fire Vampires arrived and dwelt in the molten ruins. (EXP: "Timeline of the Cthulhu Mythos," Shannon Appelcline)

Some primitive life may have evolved on Earth a little under four billion years ago, accompanied shortly by the arrival of Tsathoggua and Chaugnar Faugn. (EXP: "Timeline of the Cthulhu Mythos," Shannon Appelcline)

Roger Little speculated that Chuagnar Faugn might have created the Miri Nigri about 2 billion years ago, molding them "from the plankton-like swarms of small organisms which must have drifted with the tides through the ancient oceans". (CIRCLE: The Horror from the Hills)

More than a thousand million years ago, the Elder Things came to Earth, settling on the area that would eventually come to be known as Antarctica. This was not long after the formation of the moon, at a time in which the entire surface of the Earth was submerged, so their first settlements were aquatic. However, as the continents started to emerge, the Elder Things began to colonize land as well. They created the Shoggoths and other artificial bio-forms which would eventually evolve into Earth's vertebrates, including Humans. (HPL: At the Mountains of Madness)

The first species to challenge the Elder Things for supremacy on Earth were the Cthulhi (a.k.a. Spawn of Cthulhu or "Cosmic Octopi"), which arrived with their leader, Cthulhu, after the emergence of the first continents (HPL: At the Mountains of Madness). However, some believe that the Cthulhi were already present in the South Pacific since before the formation of the moon (EXP: The Transition of Titus Crow).

600 million years ago, the Flying Polyps came to Earth, preyed upon the inhabitants, and built windowless basalt cities. (HPL: The Shadow Out of Time)

350 million years ago, the Deep Ones may have helped build the city of R'lyeh. (EXP: "Timeline of the Cthulhu Mythos," Shannon Appelcline) Certainly they served Cthulhu in some capacity. (HPL: The Shadow Over Innsmouth)

Despite their cephalopod appearance, the Cthulhi were land-based creatures and settled on the continents, where they built their great cities. Their wars against the Elder Things ended with treaties that granted most of the Earth's newly-formed landmasses to the Cthulhi, while the Elder Things retained the oceans and Antarctica. (HPL: At the Mountains of Madness)

Human cultists such as Castro believe that Cthulhu and his kin were forced into hibernation because "when the stars were wrong, They could not live" (HPL: "The Call of Cthulhu"). William Dyer, recounting the history of the Earth that he learned from the murals of the Elder Things, wrote simply that "suddenly the lands of the Pacific sank again, taking with them the frightful stone city of R'lyeh and all the cosmic octopi" (HPL: At the Mountains of Madness). The K'n-yanians, themselves brought to Earth by Cthulhu in prehistory, believed that the sinking of R'lyeh and Cthulhu's imprisonment were the work of hostile "space-devils". (HPL: The Mound) Whatever the cause, Cthulhu was able to project his wishes into the minds of the living races until R'lyeh sank entirely and cut off his telepathic influence. (HPL: "The Call of Cthulhu")

275 million years ago, the Serpent People arise and found the kingdom of Valusia. (EXP: "Timeline of the Cthulhu Mythos," "The Children of Yig," Shannon Appelcline) Some would mind-swap with the Great Race of Yith. (HPL: The Shadow Out of Time)

After the fall of R'lyeh, the Elder Things reclaimed dominance of the planet and would remain active on both the continents and the oceans. Those who lived in oceanic cities employed Shoggoths to perform labour, while those on land favored the domestication of the great reptiles that flourished throughout the Paleozoic and Mesozoic eras. As time passed, the Shoggoths became increasingly intelligent, imitative, and harder to handle, to the point that large-scale rebellions took place, culminating in terrible wars between the amorphous shapeshifters and their star-headed masters. Dyer claims these events took place "toward the middle of the Permian age, perhaps 150 million years ago" (HPL: At the Mountains of Madness). In reality, however, the Permian ended about 252 million years ago.

While these events took place, the Great Race of Yith was already established on Earth, having subsumed the bodies of an unnamed conical Earthly species. The Yithians waged war on the Flying Polyps, driving them underground, and proceeded to project themselves further in time into the bodies of later races (including their own descendants), gathering knowledge and sometimes escaping death when they reached old age. They even abducted inhabitants of other planets and the Dreamlands and held their minds captive while inhabiting their bodies. Nathaniel Wingate Peaslee, who was himself one of the Yithians' mind-swapped victims, recognized the time period he was held captive in as being either the Permian or Triassic, based on what he could observe of geography, vegetation and zoology, and estimated it as being about 150 million years ago (HPL: The Shadow Out of Time). However, it should be noted that in reality the Triassic ended about 201 million years ago, so it's possible that Peaslee's estimates might have been wrong.

In the Jurassic period, the Mi-go arrived on Earth from Yuggoth. The Elder Things, who had successfully re-enslaved the Shoggoths, found themselves at war again with a new adversary that they were unprepared to deal with. Unable to leave Earth as they had lost the knowledge of space travel at this point, the Elder Things were forced to retreat to the oceans and to their original foothold in Antarctica. (HPL: At the Mountains of Madness)

The Yithian civilization ceased around 50 million years ago as a result of some vengeance wrought by the Flying Polyps. The Yithians fled into the future, stealing the bodies of a beetle race who would live long after humanity had died out. After the departure of the Yithians, a species of winged, black-snouted creatures became the next dominant civilization on Earth during the Cenozoic. (HPL: The Shadow Out of Time) It's possible that these might be the Black Winged Ones. (HPL: "The Call of Cthulhu")

It was also about 50 million years ago that the Elder Things founded the Antarctic city that would later be discovered by Dyer and Danforth. Dyer describes this as "early in the Cretaceous age" (HPL: At the Mountains of Madness), even though, again, the Cretaceous ended about 66 million years ago.

5 million years ago, at the peak of their power, the Serpent People's city of Yoth was destroyed by their god Yig. (EXP: "Timeline of the Cthulhu Mythos," "The Children of Yig," Shannon Appelcline)

By the time of the Pliocene, the Elder Things had no more land cities except in Antarctica. It is believed that cultural decline and the inability to handle the next waves of Shoggoth uprisings might have been responsible for the Elder Things' ultimate extinction on Earth. (HPL: At the Mountains of Madness)

Three million years ago, Rhan-Tegoth came to Earth from Yuggoth and settled on the Arctic region, to be worshiped and fed sacrifices by its inhuman followers. (HPL: "The Horror in the Museum")

Other sapient species that evolved on Earth and built their civilizations before the rise of humankind include the horned quadrupedal reptiles that built the Nameless City (HPL: "The Nameless City"). It is believed that these creatures were originally an aquatic race that worshiped Cthulhu (AWD: "The Keeper of the Key").

At some point, the Fishers from Outside came to Earth and built outposts in central Africa. (HPL: "The Outpost", "Winged Death")

Early Human History[]

Proto-humans first arose under the Elder Things, and were regarded as both amusing buffoons and as food. (HPL: At the Mountains of Madness) However, the alien K'n-yanians have also claimed to be the ancestors of modern Humans. (HPL: The Mound) The Necronomicon claims that the "Old Ones" once broke through to Earth and ruled it, and left some part of themselves in mankind; the only part that can perceive them. They remained on Earth in some sense, but invisible and largely immaterial, in some other dimension. They left behind traces in the frozen Antarctic and in ruins in the depths of the sea, as well as in Kadath in the Dreamlands. (HPL: "The Dunwich Horror")

200,000 years ago, the human kingdom in Mu reaches its height, while Europe is inhabited by "hybrid entities" and Hyperborea is home to the cult of Tsathoggua. At this time, the Muvians worship many dark gods, including Ghatanothoa, Ythogtha, and Zoth-Ommog. In the Year of the Red Moon, Ghatanothoa becomes the supreme god in Mu, following the god's destruction of a high priest of Shub-Niggurath. ("Out of the Aeons", Lovecraft and Heald)

About 126,000 years ago, a king of Lomar has his mind swapped with a Yithian. (HPL: The Shadow Out of Time)

c. 80,000 BC: Pht'thya-l'yi, daughter of Mother Hydra, comes to live in the Deep One city of Y'ha-nthlei. (HPL: The Shadow Over Innsmouth)

According to Brule the Spear-slayer, mankind waged wars against several types of creatures before it emerged victorious on Earth, including "the bird-women, the harpies, the bat-men, the flying fiends, the wolf-people, the demons, the goblins", and perhaps chief of all the Serpent People. By the time of Kull, only the Serpent People and a few of the Wolf-men remained. However, knowledge of these ancient foes had faded into legend by this point, allowing the Serpent People to use their magic to secretly infiltrate and try to reclaim power over Valusia, disguising themselves as humans. (CIRCLE: "The Shadow Kingdom")

In the British Islands, a human tribe known as the "Children of the Night" were driven to the underground by the ancestors of the Picts and eventually evolved into a reptilian race of subterranean creatures known as the "Little People", a.k.a. "Worms of the Earth". (CIRCLE: "The Children of the Night", "People of the Dark", "Worms of the Earth")

About 50,000 BC, a South African general had his mind swapped with a member of the Great Race of Yith. (HPL: The Shadow Out of Time)

About 26,000 years ago, the kingdom of Lomar was destroyed by the Gnophkehs. (HPL: "Polaris", The Mound)

Colonel Urquart believes that the Lloigor came to Earth at some point between 20,000 and 12,000 years ago, settling on Mu and enslaving its human inhabitants. (EXP: "The Return of the Lloigor")

c. 18,000 BC: A Great Cataclysm destroys the old world, bringing in the Hyperborean Age. (EXP: "Timeline of the Cthulhu Mythos," "The Children of Yig," Shannon Appelcline) Some furry proto-human Hyperboreans who worshipped Tsathoggua were among those abducted by the Great Race of Yith. c. 15,000 BC the Cimmerians, under the chieftain Crom-Ya, begin their ascent to glory. (HPL: The Shadow Out of Time)

c. 10,000 BC: The time of Conan. The Cimmerian barbarian wipes out the last Serpent People in their Hyborian city of Yanyoga. (EXP: "Timeline of the Cthulhu Mythos," "The Children of Yig," Shannon Appelcline)

c. 9550 BC: A final cataclysm destroys the Hyperborian world and rises new land masses, moving the world into more or less its modern configuration. Portions of the Hyborian continent, Poseidonis, and Mu all sink beneath the waves. In later times, this event is remembered as the Great Flood. (CIRCLE: "The Hyborian Age," Howard; EXP: "Timeline of the Cthulhu Mythos," Shannon Appelcline)

The cataclysm that sank most of the Earth's landmasses was caused by the alien "space-devils" who are enemies of Cthulhu. The K'n-yanians, believing that all surviving Humans were in league with the "space-devils", cut off all contact with humanity at this point and sealed the entrances that led to subterranean K'n-yan. (HPL: The Mound)

Laban Shrewsbury believes that the same cataclysm that submerged Atlantis and Mu also caused the Nameless City to rise from the seas and turn into desert, driving its saurian inhabitants to extinction. Originally a domain of Cthulhu, the Nameless City was claimed by Hastur and became a harbour for the Byakhee. (AWD: "The Keeper of the Key")

c. 2200 BC: Reign of Queen Nitocris, the Ghoul-Queen, in Sixth Dynasty Egypt. She revives the worship of Nyarlathotep once more, and uncovers the Shining Trapezohedron. She leaves behind an artifact known as the Mirror of Nitocris. (HPL: "Imprisoned with the Pharaohs", Lovecraft and Houdini; EXP: "The Mirror of Nitocris", Lumley) Between 1640 and 1674 BC, during the Fourteenth Dynasty of Egypt, Khephnes learns the secrets of Nyarlathotep. He is also among those who temporarily exchanges minds with one of the Great Race of Yith. (HPL: The Shadow Out of Time)

Between 1000 BC and 40 AD: The people of K'n-yan find a way to halt the aging process and prevent death by any means save violence, accident, or personal will. (HPL: The Mound)

During the classical period, a Greco-Bactrian official named Theodotides, and a quæstor named Titus Sempronius Blaesus from the time of the Roman dictator Sulla, were among those that exchange minds with one of the Great Race of Yith. (HPL: The Shadow Out of Time) The cannibal-infested ruins beneath Exham Priory allegedly dated to at least this early. (HPL: "The Rats in the Walls")

Abdul Alhazred writes the Kitab Al-Azif. In 738 AD, Alhazred dies; allegedly killed in the marketplace of Damascus by an invisible monster. In 950 AD Theodorus Philetas of Constantinople translates the Kitab Al-Azif into Greek, and renames it the Necronomicon. In 1050 AD Patriarch Michael, disturbed by rumors about experimentation with the Necronomicon, has many copies of the book burned. According to Olaus Wormius in his introduction to the Latin edition, all known copies of the Arabic versions are destroyed as well. In the 12th century Ibn Khallikan writes a biography of Abdul Alhazred. In 1232 AD Pope Gregory IX bans the Greek and Latin Necronomicons. (HPL: "History of the Necronomicon")

1261: King Henry III of England grants the site of Exham Priory to Gilbert de la Poer, also known as Baron Exham. The building itself is constructed atop the previously existing ruins some time thereafter. (HPL: "The Rats in the Walls")

Ludvig Prinn claimed to be the sole survivor of the Ninth Crusade of 1271. As a captive in Syria, he spoke to great wizards and learned magic that allowed him to extend his life for centuries. (CIRCLE: "The Shambler from the Stars")

In 1369, a red comet passes close to Earth and is visible in the night sky of Averoigne for several weeks, during which time an extraterrestrial beast possesses the body of the Abbot Theophile. (CIRCLE: "The Beast of Averoigne")

c. 1400: A man said to be a ghoul is buried in a Holland graveyard, along with a jade amulet of the "corpse-eating cult" of the Plateau of Leng. (HPL: "The Hound")

Modern History[]

1501: A folio edition of the Greek Necronomicon is made on printing presses in Italy, leading to its suppression by religious authorities. (HPL: "History of the Necronomicon")

In 1526, a Turkish army led by Selim Bahadur raids the Hungarian village of Stregoicavar and massacres its inhabitants, leaving not a single man, woman or child alive. The mysterious creature known as the Master of the Monolith is destroyed with a combination of fire, steel blessed by Mohammad, and ancient incantations, but many of the Turks are also killed in the process. (CIRCLE: "The Black Stone")

1541, October 7: conquistador Pánfilio de Zamacona y Nuñez finds the underground civilization of K'n-yan. He is forbidden to leave, and is eventually killed in an attempt to escape. (HPL: The Mound)

Between 1500 and 1550, a Greek Necronomicon is printed in Italy. In the 17th century a Latin Necronomicon is printed in Spain, while by 1692 what was purportedly the last Greek copy was burned in Salem. (HPL: "History of the Necronomicon")

Sir Randolph Carter studies magic during the reign of Queen Elizabeth I. (HPL: "The Silver Key")

Aged Frenchman Pierre-Louis Montagny from Louis XIII's time and Suffolk gentleman James Woodville from Cromwell's day mindswapped with the Great Race of Yith. (HPL: The Shadow Out of Time)

In 1653, German mystic Rudolf Yergler finishes his book, Chronike von Nath, and loses his sight and his sanity. (CIRCLE: "Music of the Stars")

On June 21, 1775, Junipero Serra buries the three San Xavier bells in the Pinos Range, with a note warning whoever unearths them about the danger they represent. (CIRCLE: "The Bells of Horror")

In 1781, Yergler's Chronike von Nath is translated to English by James Sheffield, who modifies the work and removes some of its content. (CIRCLE: "Music of the Stars")

In 1793, Spanish explorer Juan Gonzales discovers the Temple of the Toad in Honduras. (CIRCLE: "The Thing on the Roof")

In 1838, Obed Marsh finds that the population of Walakea's island (consisting mostly of Deep One hybrids) has been completely wiped out by another group of islanders who protected themselves against the vengeful Deep Ones with stones marked with the sign of an ancient enemy of theirs. (HPL: The Shadow Over Innsmouth)

In 1839, the first edition of the Unaussprechlichen Kulten, by Friedrich von Junzt, is published in Dusseldorf. This version, known informally as "the Black Book", would become exceedingly rare in the future. On the next year, von Junzt is found dead, strangled in his chamber with marks of taloned fingers on his throat, six months after returning from a journey to Mongolia. (CIRCLE: "The Black Stone", "The Thing on the Roof", HPL: "Out of the Aeons")

In 1846, Obed Marsh and his Deep One allies take over the town of Innsmouth, forcing all inhabitants to convert to the Esoteric Order of Dagon. Several men of Innsmouth, including Marsh himself, marry Deep One women, resulting in a whole generation of hybrids. (HPL: The Shadow Over Innsmouth)

1860: William Channing Webb encounters a "singular tribe or cult of degenerate Esquimaux" on the western coast of Greenland. This caste is found repeating the chant "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn". (HPL: "The Call of Cthulhu")

The Colour Out of Space falls to Earth in a meteorite in 1882. (HPL: "The Colour Out of Space")

In 1890, Audrey Davis, interred in a psychiatric hospital in Guthrie, gives birth to four hybrid offspring of Yig. Although three of the misshapen creatures die, one survives and would still be alive 35 years later. (HPL: "The Curse of Yig")

November 1907: Cthulhu cultists captured in New Orleans. (HPL: "The Call of Cthulhu")

Nathaniel Wingate Peaslee has his body hijacked by a member of the Great Race of Yith between 1908 and 1913. (HPL: The Shadow Out of Time)

In 1910, a world-renowned stage magician and escapist visits Egypt, where he ends up abducted and abandoned in subterranean catacombs and witnesses the Children of the Sphinx offering food to their deity. (HPL: "Imprisoned with the Pharaohs")

In 1912, Sir Arthur Jermyn discovers the ruins of a white ape city in Congo. (HPL: "Facts Concerning the Late Arthur Jermyn and His Family") On the same year, Lavinia Whateley is impregnated by Yog-Sothoth. On February 2, 1913, she gives birth to twins. (HPL: "The Dunwich Horror")

In 1921, poet Justin Geoffrey visits the village of Stregoicavar, Hungary, and sees the mysterious Black Stone that would inspire him to write The People of the Monolith. (CIRCLE: "The Black Stone", HPL: "The Thing on the Doorstep") In the United States, a monster hunter uses dynamite to destroy the Martense Family mansion along with a large portion of Tempest Mountain, in an attempt to eradicate a race of subterranean creatures. (HPL: "The Lurking Fear")

In 1922, a new species of intelligent serpentine sea creatures is discovered. (HPL: "The Horror at Martin's Beach")

1925: Cthulhu rises. Wave of madness in sensitive individuals worldwide. (HPL: "The Call of Cthulhu")

In 1926, Justin Geoffrey dies screaming while interred in a psychiatric hospital. (CIRCLE: "The Black Stone", HPL: "The Thing on the Doorstep") On Halloween night that year, Lavinia Whateley dies under unknown circumstances. (HPL: "The Dunwich Horror")

The year of 1928 saw a number of events, including the discovery of Zamacona's manuscript (HPL: The Mound), the military occupation of Innsmouth and submarine attack on Devil Reef (HPL: The Shadow Over Innsmouth), the revival and destruction of Joseph Curwen (HPL: The Case of Charles Dexter Ward), the correspondence between Albert Wilmarth and Henry Wentworth Akeley and mysterious disappearance of the latter (HPL: The Whisperer in Darkness), the Partridgeville earthquake and Halpin Chalmers' fatal encounter with the Hounds of Tindalos (CIRCLE: "The Hounds of Tindalos"), the death of the Whateley twins (HPL: "The Dunwich Horror"), and the disappearance of Randolph Carter (HPL: "Through the Gates of the Silver Key").

In 1929, Dr. Thomas Slauenwite crossbreeds the devil-flies of Uganda with another fly species, creating a hybrid variety that is just as deadly. (HPL: "Winged Death")

In 1930, Randolph Carter returns to Earth, albeit inhabiting the body of the Yaddithian wizard Zkauba (HPL: "Through the Gates of the Silver Key"). On the same year, Ithaqua consumes the inhabitants of the Canadian village of Stillwater and abducts Allison Wentworth, James Macdonald, and Irene Masitte (AWD: "The Thing That Walked on the Wind"). On September 2, the Pabodie Expedition sets out for Antarctica, setting foot on the continent on November 9. On January 22, 1931, they discover a new mountain range and the preserved bodies of still-living Elder Things (HPL: At the Mountains of Madness).

In spring, 1931, a reclamation project on the shores of Lake Michigan accidentally results in the removal of the star-shaped stones of the Elder Gods, causing a number of ancient psychic entities to escape from their watery prison and influence the minds of local men and women, provoking a spree of violence and depravity. (AWD: "The Horror from the Depths") On midsummer night, a foreign traveler visiting the Hungarian village of Stregoicavar spends the night observing the Black Stone and sees the phantom images of the sacrifices offered to the Master of the Monolith over 400 years before. (CIRCLE: "The Black Stone", HPL: "The Thing on the Doorstep")

In 1935, Miskatonic University funds an expedition to excavate the ruins of a Yithian city on the Great Sandy Desert in Australia. (HPL: The Shadow Out of Time)

Future History[]

2169: Pickman Carter, descendant of Randolph Carter's family line, uses "strange means" to repel Mongol hordes from Australia. ("Through the Gates of the Silver Key" Lovecraft and E. Hoffman Price)

In 2321, Gustav Norby discovers a new comet which is actually Ktynga, home of Fthaggua and its Fire Vampires. When the comet approaches the Earth, the Vampires consume thousands of humans before leaving the solar system once again. Ktynga returns in 2327 and 2332, killing thousands of victims each time. When it returns in 2339, however, Norby finds a way to destroy Fthaggua. (CIRCLE: "The Fire Vampires")

2518: Australian physicist Nevil Kingston-Brown dies. In his life, he was one of those who exchanged minds with a Yithian. (HPL: The Shadow Out of Time)

The empire of Tsan-Chan is formed circa 4901 (HPL: "Beyond the Wall of Sleep") or 5000 (HPL: The Shadow Out of Time).

c. 16,000: The wizard Nug-Soth is one of many across time who exchanges minds with one of the Great Race of Yith. (HPL: The Shadow Out of Time)

Legends claimed that Cthulhu and the Old Ones would one day awaken and destroy human civilization, leading their followers in an orgy of violence and freedom. (HPL: "The Call of Cthulhu") Alternatively, human civilization may have been destroyed by Nyarlathotep and his followers. (HPL: "Nyarlathotep") The Necronomicon for its part promises that the Old Ones, who once broke through to Earth, would do so again through Yog-Sothoth and replace man as Earth's rulers. (HPL: "The Dunwich Horror")

Some time after humanity, a "mighty beetle race" would arise, only to have their bodies and civilization stolen by the Great Race of Yith. In time, they too would pass, and the Great Race would move on to vegetable inhabitants of Mercury. Other races would inhabit the freezing Earth at various later points, burrowing deep into its core. The final inhabitants of Earth would be arachnids, some of whom would be mind-swapped with the Great Race. (HPL: The Shadow Out of Time)

Inhabitants[]

Races[]

Arachnids (HPL: The Shadow Out of Time)
Black Winged Ones (HPL: "The Call of Cthulhu")
Brothers of Chaugnar Faugn (CIRCLE: The Horror from the Hills)
Cave Beasts (HPL: "The Beast in the Cave")
Children of Tsathoggua (CIRCLE: "The Thing on the Roof")
Chthonians (EXP: "Cement Surroundings")
Cthulhi (HPL: "The Call of Cthulhu")
Dark Young of Shub-Niggurath (CIRCLE: "Notebook Found in a Deserted House")
Deep Ones (HPL: "Dagon")
Dryads (HPL: "The Tomb")
Dwellers in the Depths (EXP: "The Horror from the Bridge")
Elder Things (HPL: At the Mountains of Madness)
Fishers from Outside (HPL: "The Outpost")
Flying Polyps (HPL: The Shadow Out of Time)
Formless Spawn (CIRCLE: "The Tale of Satampra Zeiros")
Ghouls (HPL: "Pickman's Model")
Gnophkehs (HPL: "Polaris")
Gray Weavers (EXP "The Descent into the Abyss")
Great Race of Yith (HPL: The Shadow Out of Time)
- Cone-shaped Mesozoic hosts
- Coleopterans
Gyaa-Hua (HPL: "Bothon")
Hidden Ones (EXP: "The Descent into the Abyss")
Humans
Inhabitants of the Nameless City (HPL: "The Nameless City")
Jinn (CIRCLE: "The Shambler from the Stars")
K'n-yanians (HPL: The Mound)
Little People (ADJ: "The Novel of the Black Seal")
Living ice (CIRCLE: "The Ice-Demon")
Lloigor (EXP: "The Return of the Lloigor")
Martenses (HPL: "The Lurking Fear")
Martin's Beach Creatures (HPL: "The Horror at Martin's Beach")
Mi-go (HPL: The Whisperer in Darkness)
- Mites of Yuggoth (EXP: The Bermuda Triangle)
Minions of Othuum (EXP: "Rising with Surtsey")
Miri Nigri (CIRCLE: The Horror from the Hills)
Rat People (HPL: "The Rats in the Walls")
Rat-Things (HPL: "The Dreams in the Witch-House")
Sand-dwellers (AWD: "The Gable Window")
Sasquatches (EXP: Trail of Tsathoggua)
Sea-dwellers (CIRCLE: "The Black Kiss")
Serpent-men (CIRCLE: "The Shadow Kingdom")
Shoggoths (HPL: At the Mountains of Madness)
- Shoggoth Lords (EXP: "Fat Face")
Spawn of the Green Abyss (ADJ: "Spawn of the Green Abyss")
Tcho-Tchos (AWD: "The Lair of the Star-Spawn")
Thuum'ha (HPL: "The Doom that Came to Sarnath")
Trolls (EXP: Nightmare in Norway)
Tunnelers Below (EXP: "The Terror from the Depths")
Unclean Ones (EXP: "The Descent into the Abyss")
Voormis (CIRCLE: "The Testament of Athammaus")
Werewolves (HPL: "The Ghost-Eater")
Were-Tigers (EXP: "Perchance to Dream")
White Apes (HPL: "Facts Concerning the Late Arthur Jermyn and His Family")
Xo Tl'mi-go (EXP: "Children of the Kingdom")
Yothics (HPL: The Mound)
Yuggs (EXP: "Out of the Ages")

Great Old Ones[]

Outer Gods[]

Behind the Mythos[]

Unsurprisingly, most stories in the Cthulhu Mythos take place fully or partially on Earth, although a few exceptions exist, such as "In the Walls of Eryx", "The Dweller in the Gulf", "The Hoard of the Wizard-Beast" and "The Eater of Souls", among others.