Michigan's 9th Senate district is one of 38 districts in the Michigan Senate. The 9th district was created by the 1850 Michigan Constitution, as the 1835 constitution only permitted a maximum of eight senate districts. It has been represented by Republican Michael Webber since 2023, succeeding Democrat Paul Wojno.
District 9 encompasses parts of Macomb and Oakland counties.
District 9, as dictated by the 2011 Apportionment Plan, covered the inner suburbs of Detroit in southern Macomb County, including Warren, Roseville, Eastpointe, Fraser, Center Line, and part of Clinton Township.
The district was located entirely within Michigan's 9th congressional district, and overlapped with the 18th, 22nd, 25th, 28th, and 31st districts of the Michigan House of Representatives.