Louis Carl Johanson (January 4, 1929 – March 10, 2004) was an American politician from Pennsylvania who served as a Democratic member of the Pennsylvania State Senate for the 3rd district from 1965 to 1966. He served as a member of the Philadelphia City Council from 1968 to 1981. He was convicted for bribery and conspiracy during the Abscam sting operation and served three years in prison.