| Samuel S. Brannan | |
| Order: | 13th |
| Mayor of Portage, Wisconsin | |
| Term Start: | April 1871 |
| Term End: | April 1873 |
| Predecessor: | Charles Randall Gallett |
| Successor: | Charles Randall Gallett |
| State1: | Wisconsin |
| State Assembly1: | Wisconsin |
| District1: | Columbia 1st |
| Term Start1: | January 6, 1873 |
| Term End1: | January 5, 1874 |
| Predecessor1: | William W. Corning |
| Successor1: | Jonathan Bowman |
| Party: | Republican |
| Birth Date: | 5 February 1835 |
| Birth Place: | Silver Creek, New York, U.S. |
| Death Place: | Portage, Wisconsin, U.S. |
| Death Cause: | Tuberculosis |
| Occupation: | Newspaper editor |
Samuel Stephen Brannan (February 5, 1835April 5, 1880) was an American newspaper editor, Republican politician, and Wisconsin pioneer. He was the 13th mayor of Portage, Wisconsin, and represented northern Columbia County in the Wisconsin State Assembly during the 1873 session.
Born in Silver Creek, New York, Brannan moved with his parents to Wisconsin in 1849 and settled in Portage, Wisconsin in 1850. He was one of the owners of the Portage Daily Register, and he founded the Wisconsin State Register in 1860.[1] He served on the Columbia County, Wisconsin Board of Supervisors, the Portage Common Council, and was city marshal.[2] Brannan served as Mayor of Portage in 1872 and 1873. He then served in the Wisconsin State Assembly in 1873 as a Republican. Then, Brannan served as postmaster of Portage, Wisconsin until his death.[1] He died of tuberculosis in Portage, Wisconsin.[1] [3]