Abo or ABO may refer to:
Entertainment Ābo, the Japanese name of Ekans, a fictional species in the Pokémon franchise Omegaverse, a genre of fiction also known as A/B/O
Languages Abõ or Abon, a Cameroonian language (ISO 639-3: abo) Bankon language or Abo, a Cameroonian language
Math and science ABO blood group system, a human blood type and blood group system ABO (gene), in humans which encodes the ABO blood group system transferase enzyme Adaptive Binary Optimization, an image compression algorithm
Organizations American Board of Ophthalmology, a professional organization for ophthalmologists American Board of Opticianry, a professional organization for opticians American Board of Orthodontics, a professional organization for orthodontists Antikythira Bird Observatory in Greece
People Abo (name), an Arabic or Hebrew male name Abo of Tiflis (–786), an Arab East Orthodox Catholic saint Abo, a (usually derogatory) term for Aboriginal Australians
Places Abo (historic place), an archaeological site in New Mexico, US Åbo, the Swedish name for Turku, a city in Finland Abo, Missouri, an unincorporated community Abo, New Mexico, an unincorporated community in the US Abo Canyon, also called Abo Pass, a mountain pass in central New Mexico Aboh, also known as Abo or Ibo, a town in Nigeria's Delta State Aboisso Airport in Comoé District, Ivory Coast (IATA airport code ABO) Antonio (Nery) Juarbe Pol Airport in Arecibo, Puerto Rico (FAA airport code ABO)
See also Treaty of Åbo Abbo (disambiguation) Abo Call, the first Aboriginal-focused magazine in Australia, published 1938