OBA

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

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

- Oba of Lagos
- Oba of Benin
Ōba, a Japanese surname
Oba Chandler (1946–2011), an American murderer executed in 2011
Oba Femi, a Nigerian-born professional wrestler of Yoruba heritage signed with WWE
Pierre Oba, Congolese official

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

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