| Robert J. Tennessen | |
| State Senate: | Minnesota |
| District: | 56th |
| Term Start: | 1973 |
| Term End: | 1982 |
| State Senate2: | Minnesota |
| District2: | 38th |
| Term Start2: | 1971 |
| Term End2: | 1972 |
| Birth Date: | 24 August 1939 |
| Birth Place: | Lismore, Minnesota, U.S. |
| Party: | Minnesota Democratic–Farmer–Labor Party |
| Occupation: | Attorney |
| Residence: | Minneapolis, Minnesota |
| Alma Mater: | University of Minnesota, University of Minnesota Law School |
Robert J. Tennessen (born August 24, 1939) is an American politician in the state of Minnesota. He served in the Minnesota Senate.[1]