The 18th and 22nd Michigan Senate districts, as created in the 2011 redistricting process.Michigan's 22nd Senate District, effective for the 2014 election, covers Livingston County and western Washtenaw, including Chelsea, Dexter, Manchester, Brighton, and Howell.

Senator Joe Hune was elected to the 22nd in the 2010 elections, at which time the district included Shiawasee County and did not extend into Washtenaw; the 2014 election will be the first to use the current boundaries.