"Phantasmagoria" is a poem written by Lewis Carroll and first published in 1869 as the opening poem of a collection of verse by Carroll entitled Phantasmagoria and Other Poems. The collection was also published under the name Rhyme? And Reason? It is Lewis Carroll's longest poem. Both the poem and the collection were illustrated by A.B. Frost.

Known for pointing out the absurdities of life in his fiction and poetry, Carroll took paranormal belief to the extreme in the satirical poem Phantasmagoria, the humorous story of an annoying ghost that is assigned to haunt a new house. While the owner wishes the ghost would simply leave, the ghost politely informs the man of the many types of specters and their duties, which include scaring people, making them ill, and causing mysterious disturbances. This beautifully illustrated volume is the only edition of Phantasmagoria in print outside of Carroll anthologies.

Charles Lutwidge Dodgson ( 27 January 1832 – 14 January 1900), better known by his pen name, Lewis Carroll, was an English writer, mathematician, logician, Anglican deacon and photographer. His most famous writings are Alice's Adventures in Wonderland, its sequel Through the Looking-Glass, which includes the poem Jabberwocky, and the poem The Hunting of the Snark, all examples of the genre of literary nonsense. He is noted for his facility at word play, logic, and fantasy.