Familia: Culicidae
Subfamilia: Anophelinae
Tribus: Anophelini
Genus: Anopheles
Subgenus: A. (Nyssorhynchus)
Species: Anopheles marajoara

Anopheles marajoara is a species of mosquito from the family of the mosquitoes (Culicidae). The scientific name of the species was first validly published in 1942 by Galvão & Damasceno. It has been found within Brazil in high densities and with high levels of Plasmodium infection when compared to An. darling, and is thus considered to be a dominant vectors species.