| Maurice B. Brennan | |
| Office: | Member of the Wisconsin State Assembly |
| Constituency: | Brown 2nd district |
| Term Start: | January 11, 1905 |
| Term End: | January 9, 1907 |
| Predecessor: | Joseph Martin |
| Successor: | Wallace S. Hager |
| Constituency1: | Brown 3rd district |
| Term Start1: | January 12, 1881 |
| Term End1: | January 11, 1882 |
| Predecessor1: | Chester G. Wilcox |
| Successor1: | Patrick Henry Moran |
| Party: | Republican |
| Birth Date: | 6 April 1842 |
| Birth Place: | County Kerry, Ireland |
| Death Place: | Cato, Wisconsin |
| Occupation: | Farmer |
Maurice B. Brennan (April 6, 1842August 7, 1927) was an Irish American immigrant, politician and farmer.
Born in County Kerry, Ireland, Brennan emigrated with his parents to the United States in 1848, initially settling in Springfield, Massachusetts. In 1852, Brennan and his family settled in the town of Morrison, Brown County, Wisconsin. Brennan was a livestock dealer and farmer. Brennan served as assessor of the town of Morrison. In 1881 and 1905, Brennan served in the Wisconsin State Assembly as a Republican. Brennan died at the home of his daughter in Cato, Manitowoc County, Wisconsin, where he had been living.[1] [2]