A&B may refer to:
- Above & Beyond (band)
- Abrams & Bettes: Beyond the Forecast, a program on The Weather Channel
- Antigua and Barbuda, a small island nation in the Caribbean
- Arbogast & Bastian (A&B Meats), a defunct meat-packing company based in Allentown, Pennsylvania, USA
- Assault and battery (disambiguation)
- Roman Catholic Diocese of Arundel and Brighton, England
- A&B, a bit signaling procedure used in SF (D4) framed T1 transmission facilities