| John J. Sinsimer | |
| Office1: | Member of the New Jersey General Assembly from the 24th Legislative District |
| Term Start1: | January 8, 1974 |
| Term End1: | January 13, 1976 |
| Alongside1: | Barbara A. Curran |
| Predecessor1: | District created |
| Successor1: | Dean Gallo |
| Office2: | Member of the New Jersey General Assembly from the 14th at-large district |
| Term Start2: | January 11, 1972 |
| Term End2: | January 8, 1974 |
| Predecessor2: | John F. Evers |
| Successor2: | District abolished |
| Birth Date: | 19 March 1923 |
| Birth Place: | Harrison, New Jersey |
| Death Place: | Pompton Lakes, New Jersey |
| Party: | Democratic |
John J. Sinsimer (March 19, 1923 – September 26, 1997) was an American politician who served in the New Jersey General Assembly from 1972 to 1976.[1] [2]
He died on September 26, 1997, at his home in Pompton Lakes, New Jersey at age 74.[3] He is the only Democrat to have represented the 24th District.