BKA or B.K.A. may refer to:
- Bundeskriminalamt, the German Federal Criminal Police Office
- Bundeskanzleramt, the Austrian chancellor's office
- A below-knee amputation
- Betsy's Kindergarten Adventures, a children's television show on PBS
- The British Kendo Association, a non-profit organisation supporting Kendo, Iaido, and Jodo
- Biełaruskaja Krajovaja Abarona, a Belarusian military group that fought alongside the SS during World War II
- Belarusian Auto Moto Touring Club, a member of the FIA
- IATA code for Bykovo Regional Airport near Moscow, Russia