| John C. Williamson | |
| Birth Date: | 15 September 1912 |
| Birth Place: | Oskaloosa, Kansas |
| Death Place: | Plumas County, California |
| State Assembly: | California |
| District: | 29th |
| Term: | January 7, 1963 - January 2, 1967 |
| Preceded: | Bruce F. Allen |
| Succeeded: | William M. Ketchum |
| State Assembly1: | California |
| District1: | 39th |
| Term1: | January 5, 1959 - January 7, 1963 |
| Preceded1: | H. W. "Pat" Kelly |
| Succeeded1: | George Deukmejian |
| Party: | Democratic |
| Spouse: | Laurel Jean Stewart (m. 1945) |
| Children: | 4 |
| Battles: | World War II |
John C. Williamson (September 15, 1912 – October 11, 1998) was an American politician who served in the California State Assembly for the 39th and 29th district from 1959 to 1967.[1] During World War II he served in the United States Army.[2]