| Gunder Gundersen Hammer | |
| Birth Date: | 1725 9, df=y |
| Birth Place: | Trondhjem, Norway |
| Death Place: | Stavanger, Norway |
| Citizenship: | Denmark-Norway |
| Nationality: | Norwegian |
| Profession: | Politician |
| Office: | Governor of Stavangers amt |
| Term Start: | 1768 |
| Term End: | 1772 |
| Predecessor: | Henrik Lachmann |
| Successor: | Vilhelm Mathias Skeel |
| Office2: | Governor of Finnmarkens amt |
| Term Start2: | 1757 |
| Term End2: | 1768 |
| Predecessor2: | Mathias Collett |
| Successor2: | Eiler Hagerup |
Gunder Gundersen Hammer (1725–1772) was a Norwegian politician and government official. He served as the County Governor of Finnmark county from 1757 until 1768 and then he was transferred to be the County Governor for Stavanger county from 1768 until his death in 1772.[1]