APIB may refer to:
Military АПИБ (авиацио́нный полк истребителей-бомбардировщиков), Russian for a fighter-bomber aviation regiment, particularly in the Soviet Air Forces Advanced primer ignition blowback, a design feature of some firearms
Political MÉS-APIB, a name under which the Spanish political party Més per Mallorca has stood for election Articulação dos Povos Indígenas do Brasil (Articulation of the Indigenous Peoples of Brazil), an organization representing indigenous Brazilian ethnic groups and led by Sônia Guajajara
Other Assessment of Preterm Infants’ Behavior, a standardized comprehensive test for the newly born APiB, a nickname for Alpha Pi Beta (ΑΠΒ), a sorority established at the University of Northern British Columbia in 1994