Hennepin County, Minnesota (Wikipedia) Hennepin County (/ˈhɛnəpɪn/ HEN-ə-pin) is a county in the U.S. state of Minnesota. Its county seat is Minneapolis, the state’s most populous city. The county is named in honor of the 17th-century explorer Father Louis Hennepin. The county extends from Minneapolis to the suburbs and outlying cities in the western part of the county. The county’s natural areas are covered with extensive woods, hills, and lakes.