Roscommon County, Michigan

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Roscommon County is a county in the U.S. state of Michigan. As of the 2000 census, the population was 25,469. The county seat is Roscommon[1]. Both the county and county seat are commonly referred to by locals as "Rosco".



  • It was originally set off from Mackinac County and some undesignated territory in 1840 as Mikenauk County. In 1843, it was renamed Roscommon County after County Roscommon, Ireland.[2][3]
  • There are three official Michigan historical markers in the county.[4] They are:
    • Gerrish
    • Pioneer House
    • Terney House


  • According to the U.S. Census Bureau, the county has a total area of 580 square miles (1,502 km²), of which, 521 square miles (1,350 km²) of it is land and 58 square miles (151 km²) of it (10.08%) is water.
  • Roscommon County is considered to be part of Northern Michigan
  • Roscommon County is part of the Au Sable State Forest including
    • Roscommon FMU (Ogemaw and Roscommon counties).

Geographic features

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