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County · code 26143

Roscommon CountyMichigan

Roscommon County is a county in Michigan with its seat in Roscommon, created in 1840.

  • Founded1840
  • County seatRoscommon
  • Named forCounty Roscommon, Ireland
  • Land area520 sq mi + 60 sq mi water
  • Population23,459 2020 Census
  • Parcels mapped34,408 checked 15 October 2026
Open the free map Click any parcel in Roscommon County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

CrawfordMissaukeeOgemaw Roscommon Census outline · seat marked

Where it is

Roscommon on the map of Michigan

Michigan has 83 counties and county equivalents, each with its own records office. Shapes with a page are links.

Alcona CountyAlger CountyAllegan CountyAlpena CountyAntrim CountyArenac CountyBaraga CountyBarry CountyBay CountyBenzie CountyBerrien CountyBranch CountyCalhoun CountyCass CountyCharlevoix CountyCheboygan CountyChippewa CountyClare CountyClinton CountyCrawford CountyDelta CountyDickinson CountyEaton CountyEmmet CountyGenesee CountyGladwin CountyGogebic CountyGrand Traverse CountyGratiot CountyHillsdale CountyHoughton CountyHuron CountyIngham CountyIonia CountyIosco CountyIron CountyIsabella CountyJackson CountyKalamazoo CountyKalkaska CountyKent CountyKeweenaw CountyLake CountyLapeer CountyLeelanau CountyLenawee CountyLivingston CountyLuce CountyMackinac CountyMacomb CountyManistee CountyMarquette CountyMason CountyMecosta CountyMenominee CountyMidland CountyMissaukee CountyMonroe CountyMontcalm CountyMontmorency CountyMuskegon CountyNewaygo CountyOakland CountyOceana CountyOgemaw CountyOntonagon CountyOsceola CountyOscoda CountyOtsego CountyOttawa CountyPresque Isle CountySaginaw CountySt. Clair CountySt. Joseph CountySanilac CountySchoolcraft CountyShiawassee CountyTuscola CountyVan Buren CountyWashtenaw CountyWayne CountyWexford CountyRoscommon County Roscommon
Counties of Michigan · Roscommon highlighted

History

Formed in 1840 from Michilimackinac County, Mackinac County and Saginaw County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Originally named Mikenauk when created from Michilimackinac County, it was renamed Roscommon in 1843, after County Roscommon. The county was attached to other counties for judicial purposes until it was fully organized and detached from Midland County in 1875.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1840
    Roscommon County created Mikenauk (now Roscommon) created from Michilimackinac (now Mackinac) and Non-County Area 2 attached to Saginaw; Mikenauk not fully organized, attached to Michilimackinac "for judicial purposes."
    from Michilimackinacfrom Mackinacfrom Saginaw
    · Mich. Acts 1840, ann. sess., no. 119, secs. 12, 35/pp. 197, 200
  2. 1843
    Renamed Mikenauk renamed Roscommon.
    formerly Mikenauk
    · Mich. Acts 1843, ann. sess., no. 67/p. 145
  3. 1853
    Changed Roscommon detached from Mackinac, attached to Cheboygan "for judicial and municipal purposes."
    MackinacCheboygan
    · Mich. Acts 1853, reg. sess., no. 20/p. 19
  4. 1858
    Changed Roscommon detached from Cheboygan, attached to Midland "for judicial and municipal purposes."
    CheboyganMidland
    · Mich. Acts 1858, ext. sess., no. 5, sec. 1/p. 15
  5. 1873
    Boundary clarified Roscommon boundaries were redefined (no change).
    no change
    · Mich. Acts 1873, reg. sess., no. 338/p. 85
  6. 1875
    Changed Roscommon fully organized, detached from Midland.
    Midland
    · Mich. Acts 1875, reg. sess., pub., no. 41/p. 34

Land and parcels

What the maps cover in Roscommon

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Roscommon by the Census

Population
23,459 2020 Census count
Housing units
23,069 2020 Census count
Land area
520 square miles
Water area
60 square miles
People per sq mi
45 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Records

Permits

Zoning and code

County government

See your own lot on these maps

Open Roscommon County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about Roscommon County

When was Roscommon County founded?
Roscommon County was founded in 1840, formed from Michilimackinac County, Mackinac County and Saginaw County, and named after County Roscommon, Ireland.
What is the county seat of Roscommon County?
The county seat of Roscommon County is Roscommon.
Is there an online parcel map for Roscommon County?
Yes. A public source publishes a parcel map of 34,408 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Roscommon County's boundary or name changed?
Roscommon County was created in 1840 from Michilimackinac County, Mackinac County and Saginaw County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Cheboygan County, Midland County and Mackinac County. It was formerly called Mikenauk.
Who issues septic and well permits in Roscommon County?
The county's page on septic systems and wells: Health department: septic and well.
Is my lot in a flood zone?
We do not have flood maps for Roscommon County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door