| Rosemary Bayer | |
| Office: | Member of the Michigan Senate |
| Term Start: | January 1, 2019 |
| Predecessor: | James Marleau |
| Constituency: | 12th district (2019–2022) 13th district (2023–) |
| Birth Date: | 2 January 1959 |
| Party: | Democratic |
| Spouse: | John |
| Children: | 1 |
| Residence: | Beverly Hills, Michigan, U.S. |
| Alma Mater: | Central Michigan University Lawrence Technological University |
| Website: | Rosemary Bayer |
Rosemary K. Bayer[1] (born January 2, 1959)[2] is a Democratic member of the Michigan Senate, representing the 13th district since 2023.
Before being elected to the state legislature, Bayer worked as a computer engineer and analyst. She serves on the board of directors for SheHive and co-founded the Michigan Council of Women in Technology.[3] [4]