County · code 26005
Allegan CountyMichigan
Allegan County is a county in Michigan with its seat in the city of Allegan. The county was created on March 2, 1831.
- Founded1831
- County seatAllegan
- Land area825 sq mi + 1,008 sq mi water
- Population120,502 2020 Census
- Parcels mapped69,423 checked 16 October 2026
Where it is
Allegan on the map of Michigan
Michigan has 83 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1831 from Barry County, Kalamazoo County and Cass County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Allegan County was created by Michigan Territory from parts of Barry, Kalamazoo, and Cass counties. Initially not fully organized, Allegan was attached to Kalamazoo County for legal purposes on April 1, 1833. On September 7, 1835, Allegan County was fully organized and detached from Kalamazoo.
- 1831Allegan County created Allegan created by Michigan Territory from Barry (which was attached to Kalamazoo), Non-County Area 1 attached to Cass, and Non-County Area 5 attached to Kalamazoo; Allegan not fully organized, not attached. · Mich. Terr. Laws, 3:sec. 4/p. 871
- 1833Changed Allegan attached to Kalamazoo "for all legal purposes." · Mich. Terr. Laws, 3:997-998
- 1835
Land and parcels
What the maps cover in Allegan
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 69,423 parcels from Allegan County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 16 October 2026 -
Address points Missing
No public address points layer found for Allegan County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- 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
Allegan by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Allegan County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Allegan County.
See your own lot on these maps
Open Allegan 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.
Questions
Common questions about Allegan County
- When was Allegan County founded?
- Allegan County was founded in 1831, formed from Barry County, Kalamazoo County and Cass County.
- What is the county seat of Allegan County?
- The county seat of Allegan County is Allegan.
- Is there an online parcel map for Allegan County?
- Yes. Allegan County publishes a parcel map of 69,423 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Allegan County's boundary or name changed?
- Allegan County was created in 1831 from Barry County, Kalamazoo County and Cass County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Kalamazoo County.
- Is my lot in a flood zone?
- We do not have flood maps for Allegan County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby