| Josef Duchač | |
| Office: | Minister-President of Thuringia |
| Term Start: | 8 November 1990 |
| Term End: | 11 February 1992 |
| Deputy: | Ulrich Fickel |
| Predecessor: | himself |
| Successor: | Bernhard Vogel |
| Office2: | Landesbevollmächtigter of Thuringia |
| Appointer2: | Lothar de Maizière |
| Term Start2: | 3 October 1990 |
| Term End2: | 8 November 1990 |
| Predecessor2: | Position established |
| Successor2: | himself |
| Office3: | Regierungsbevollmächtigter of Erfurt |
| Appointer3: | Lothar de Maizière |
| Term Start3: | 11 June 1990 |
| Term End3: | 3 October 1990 |
| Predecessor3: | Arthur Swatek |
| Successor3: | Position abolished |
| Office6: | Member of the Landtag of Thuringia for Gotha II |
| Term Start6: | 25 October 1990 |
| Term End6: | 30 November 1992 |
| Successor6: | Hans-Jörg Dannenberg |
| Predecessor6: | Constituency established |
| Birth Date: | 19 February 1938 |
| Residence: | Birkenwerder |
| Alma Mater: | Ingenieurschule für Gummi- und Plasttechnologie TU Dresden Technical University Leuna-Merseburg (Dipl.-Ing. oec.) |
Josef Duchač (born February 19, 1938) is a German politician (CDU).
The studied chemical engineer became a member of the East German Christian Democratic Union in 1957. After the party merged with the West German CDU following the German reunification, he was elected Thuringia's first post-reunification minister-president on October 14, 1990.
On January 23, 1992, he announced his resignation because of alleged Stasi contacts[1] and was succeeded by Bernhard Vogel on February 5, 1992.