Monster Island is a novel in the zombie apocalypse horror subgenre by American writer David Wellington, published in serial online in August, 2004 and in print in April, 2006.

Monster Island takes place in Manhattan one month after New York City has been completely overrun by the undead.

A former UN employee named Dekalb, whose daughter is being held by a warlord in Somalia in exchange for his assistance, enters the zombie-infested island with a band of East African child soldiers in order to retrieve precious AIDS medication for the warlord.

"[1] In a review that was chiefly positive, Publishers Weekly praised the book's visceral impact, describing the plot as "inventive and exciting".

They also commended Wellington for his knowledge of New York and the Monster Island's touches of dark humor, but felt that he displayed selective memory at times in composing the narrative.