Michigan's 42nd House of Representatives district (also referred to as Michigan's 42nd House district) is a legislative district within the Michigan House of Representatives located in parts of Allegan and Kalamazoo County.

[2] 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.

[3] Cass County (part) St. Joseph County (part) Cass County (part) Van Buren County (part) St. Joseph County