Jonas Karlsson
- March 11, 1971
- Södertälje, Stockholm County, Sweden
Sven Bert Jonas Karlsson (born 11 March 1971) is an Swedish actor and author.
Karlsson was born in Södertälje. He won a Guldbagge-Award for Best Actor in 2004 for the movie Details. He published his first book, a collection of short stories, in 2007.
