| Jan Kostrhun | |
| Birth Date: | 3 July 1942 |
| Birth Place: | Podivín, Protectorate of Bohemia and Moravia |
| Nationality: | Czech |
| Occupation: | Writer |
| Education: | Mendel University Brno |
| Party: | KSČ (1968) (1990–1994) ČSSD (since 1994) |
| Office: | Member of the Chamber of Deputies of the Czech Republic |
| Term Start: | 1 June 1996 |
| Term End: | 20 June 2002 |
| Office2: | Member of the Federal Assembly of Czechoslovakia |
| Term Start2: | 6 June 1992 |
| Term End2: | 31 December 1992 |
Jan Kostrhun (3 July 1942 – 2 May 2022) was a Czech politician. A member of the Czech Social Democratic Party, he served in the Chamber of Deputies from 1996 to 2002.[1] He died on 2 May 2022 at the age of 79.[2]