Marquette County is a county in the Upper Peninsula of Michigan. As of the 2010 census, the population was 67,077. The county seat is Marquette. Marquette County is the largest county in land area in Michigan, and the most populous county in the Upper Peninsula.

County government offices are in the Marquette County Courthouse at 234 W. Baraga Ave., Marquette, MI 49855.

Official web site: