AJB or A. J. B. may refer to:
Business and Organizations Aero JBR (ICAO code AJB), a Mexican airline AJ Bell (LSE: AJB), a public limited company that provides online investment services Al Jazeera Balkans (AJB), an international news television service headquartered in Sarajevo, Bosnia Association of Jews in Belgium (AJB), former organization set up by the Germans to administer the Belgian Jewish population, 1941
People A. J. B. Hope, one of the monikers of Alexander Beresford Hope (1820–1887) A. J. Braga (1900–1968), Singaporean politician Archibald James Butterworth (1912–2005), inventor and racing motorist who built the A.J.B. Special, a Formula One car
Publications American Journal of Botany, monthly peer-reviewed scientific journal American Journal of Business, biannual peer-reviewed academic journal The Amazing Jeckel Brothers, an album by Insane Clown Posse The Amazing Joy Buzzards, a comic book series