Karl Johnson
- Birth Date
- 3/1/1948
- Birth Place
- Wales, UK
- Known For
- Acting

Karl Johnson is a Welsh actor, appearing on stage, film and television. His most notable role to date is the title role in Derek Jarman's 1993 film Wittgenstein.

Karl Johnson is a Welsh actor, appearing on stage, film and television. His most notable role to date is the title role in Derek Jarman's 1993 film Wittgenstein.