Oba or OBA may refer to:
Science, technology, business, management Office Business Applications, software which uses applications within the Microsoft Office system On base average, a baseball statistic Online Behavioral Advertising, a range of technologies and techniques used by online website publishers and advertisers Optical Brightening Agent, a type of dye used in fabric and paper Output-based aid, a type of aid to support the delivery of public services in developing countries Out-of-band agreement, in communications Oxygen Breathing Apparatus, an oxygen supply system used by the US Navy for firefighting
Organisations and institutions Oklahoma Bible Academy, a Christian secondary institution in Enid, Oklahoma, U.S. Oklahoma Bankers Association, a trade association in Oklahoma, U.S. Oklahoma Bar Association, the state bar (legal association) of Oklahoma, U.S. One Bermuda Alliance, a Bermuda political party Only Boys Aloud, Welsh male voice choir Ontario Bar Association Openbare Bibliotheek Amsterdam, the public library of Amsterdam Ormiston Bolingbroke Academy, a school in Runcorn, England
People Oba (ruler), a Yoruba title for Kings and Royals
Oba of Lagos Oba of Benin Ōba, a Japanese surname Oba Chandler (19462011), an American murderer executed in 2011 Oba Femi, a Nigerian-born professional wrestler of Yoruba heritage signed with WWE Pierre Oba, Congolese official
Places Oba, Ontario a remote hamlet in Ontario, Canada Oba Island, in Vanuatu Oba-Igbomina, a town in Nigeria Oba, Anambra, a town in Anambra State, Nigeria Oba River, a river in Nigeria Orange Beach, Alabama Oba, Indonesia - that part of the administered area of the town of Tidore lying on Halmahera Island Oba Market, Historical market at Ring Road in Edo State, Nigeria
Other Oba: The Last Samurai, a 2011 Japanese film Oba (orisha), a Yoruba deity prominent in various African traditional religions and Afro-American religions One Big Beautiful Bill Act, a U.S. bill commonly abbreviated as OBBBA
See also Ago-Oba, an electoral ward in the city of Abeokuta, Ogun State, Nigeria Obba (disambiguation)