| Jan Schaefer | |
| Office: | State Secretary for Housing and Spatial Planning |
| Term Start: | 11 May 1973 |
| Term End: | 8 September 1977 |
| Alongside: | Marcel van Dam |
| Primeminister: | Joop den Uyl |
| Predecessor: | Werner Buck |
| Successor: | Gerrit Brokx |
| Office1: | Member of the House of Representatives |
| Term Start1: | 3 June 1986 |
| Term End1: | 23 February 1990 |
| Term Start2: | 8 June 1977 |
| Term End2: | 6 September 1978 |
| Term Start3: | 11 May 1971 |
| Term End3: | 11 May 1973 |
| Parliamentarygroup3: | Labour Party --> |
| Birthname: | Johannes Lodewijk Nicolaas Schaefer |
| Birth Date: | 1940 3, df=y |
| Birth Place: | Amsterdam, Netherlands |
| Death Place: | Amsterdam, Netherlands |
| Death Cause: | Diabetes mellitus |
| Nationality: | Dutch |
| Party: | Labour Party (from 1969) |
| Otherparty: | Communist Party of the Netherlands (1960–1965) |
| Children: | 1 son and 1 daughter |
Johannes Lodewijk Nicolaas "Jan" Schaefer (16 March 1940 – 30 January 1994) was a Dutch politician and community organiser who served as State Secretary for Housing and Spatial Planning from 1973 to 1977 under Joop den Uyl's cabinet.[1] He was a member of the Communist Party of the Netherlands (CPN) until 1965, before he joined the Labour Party (PvdA) in 1969. Schaefer was first elected to the House of Representatives in the 1971 general election, where held a seat with interruptions until 1990. He also served as an alderman in the municipal executive of Amsterdam from 1978 to 1986, in charge of housing.
Bridge 2000 or Jan Schaeferbrug in Amsterdam's Eastern Docklands, built from 1999 to 2001, was named after him in 2000. Jan Schaeferpad, a street in Amsterdam-Zuidoost, also bears his name since 2000.