Innsmouth, Massachusetts is a fictional town in the writings of H. P. Lovecraft, part of the Lovecraft Country setting of the Cthulhu Mythos.

Lovecraft first used the name "Innsmouth" in his 1920 short story "Celephaïs" (1920), where it refers to a fictional village in England. Lovecraft's more famous Innsmouth, however, is found in his (1936) story "The Shadow Over Innsmouth", set in Massachusetts. This latter Innsmouth was first identified in two of the sonnets in Fungi from Yuggoth.

Lovecraft called Innsmouth "a considerably twisted version of Newburyport", Massachusetts.

Read more about Innsmouth:  Location, Description, History, Esoteric Order of Dagon, Other Appearances, Manuxet River