| Casper Fischer | |
| State House2: | Minnesota |
| District2: | 20th |
| Term Start2: | 1963 |
| Term End2: | 1966 |
| Term Start3: | 1967 |
| Term End3: | 1972 |
| Birth Date: | 5 March 1929 |
| Birth Place: | Marshall, Minnesota, U.S. |
| Death Place: | Marshall, Minnesota, U.S. |
| Party: | Conservative Caucus |
| Occupation: | Farmer/Beef Cattle Feeder |
| Residence: | Marshall, Minnesota |
William Casper "Cap" Fischer (March 5, 1929 – August 6, 2022)[1] was an American politician in the state of Minnesota. He served in the Minnesota House of Representatives from 1963 to 1966 and 1967 to 1972.[2]