IBB may refer to:
Internet
edit- Indiana Business Bulletin, a business-news website
- Internet Bug Bounty, a Bug bounty program for Internet-related software
Institutes
edit- Institute of Bioinformatics and Biotechnology, a scientific research institute in Pune, India
- Institute of Biochemistry and Biophysics, a research institute in Iran
- Ibrahim Badamasi Babangida University, university in Nigeria
Cities
edit- Ibb (Arabic: إب), a city in Yemen
People
edit- Ibrahim Badamasi Babangida, former President of Nigeria
Other
edit- Intentional base on balls, a ploy in baseball
- International Broadcasting Bureau, technical support body for the Voice of America and other US government broadcasting services
- Istanbul Metropolitan Municipality (Turkish: İstanbul Büyükşehir Belediyesi), the governing body of Istanbul
- International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers, a US trade union