William Joseph "B.J." Blazkowicz is the protagonist of the video game Wolfenstein 3D developed by id Software and published by Apogee Software.
The name B.J. Blazkowicz may refer to:
- B.J. Blazkowicz (Activision), the incarnation of the character feutured in the Wolfenstein video games developed by Gray Matter Studios and published by Activision
- B.J. Blazkowicz (MachineGames), the incarnation of the character feutured in the Wolfenstein video games developed by MachineGames and published by Bethesda Softworks