Michigan's 66th House of Representatives district
Michigan's 66th House of Representatives district is a legislative district within the Michigan House of Representatives located in parts of Macomb and Oakland counties. The district was created in 1965, when the Michigan House of Representatives district naming scheme changed from a county-based system to a numerical one.
Historical district boundaries
| Map | Description | Apportionment Plan | Notes |
| Oakland County | 1964 Apportionment Plan | ||
| Oakland County | 1972 Apportionment Plan | ||
| Oakland County | 1982 Apportionment Plan | ||
| Livingston County | 1992 Apportionment Plan | ||
| Livingston County | 2001 Apportionment Plan | ||
| Kalamazoo County | 2011 Apportionment Plan |