Parcel Chartplaces Open the free map

County · code 26067

Ionia CountyMichigan

Ionia County is a county in Michigan with its seat in Ionia, formed in 1831.

  • Founded1831
  • County seatIonia
  • Named forIonia
  • Land area571 sq mi + 8.7 sq mi water
  • Population66,804 2020 Census
  • Parcels mapped31,527 checked 15 October 2026
Open the free map Click any parcel in Ionia County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

MontcalmClintonKent Ionia Census outline · seat marked

Where it is

Ionia 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 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 CountyRoscommon CountySaginaw CountySt. Clair CountySt. Joseph CountySanilac CountySchoolcraft CountyShiawassee CountyTuscola CountyVan Buren CountyWashtenaw CountyWayne CountyWexford CountyIonia County Ionia
Counties of Michigan · Ionia highlighted

History

Formed in 1831 from Michilimackinac County, Mackinac County and Kalamazoo County

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

Ionia County was created by Michigan Territory on March 2, 1831, from Michilimackinac County. The county was named after Ionia. Initially unorganized and attached to Kent County for judicial purposes, Ionia was fully organized and detached from Kent on April 3, 1837. Montcalm County, attached to Ionia for judicial purposes in 1837, was fully organized and detached in 1850.

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

  1. 1831
    Ionia County created Ionia created by Michigan Territory from Michilimackinac (now Mackinac) and Non-County Area 5 attached to Kalamazoo; Ionia not fully organized, not attached.
    from Michilimackinacfrom Mackinacfrom Kalamazoo
    · Mich. Terr. Laws, 3:sec. 2/p. 871
  2. 1836
    Changed Ionia attached to Kent "for judicial purposes."
    Kent
    · Mich. Acts 1836, ann. sess., p. 65
  3. 1837
    Changed Ionia fully organized, detached from Kent. Part of Isabella detached from Saginaw, attached to Ionia; Montcalm attached to Ionia. Both attachments were "for judicial purposes."
    KentIsabellaSaginawMontcalm
    · Mich. Acts 1837, ann. sess., no. 51/p. 97
  4. 1840
    Changed Isabella detached from Ionia, re-attached to Saginaw "for judicial purposes;" attachment of Montcalm to Ionia was confirmed (no change).
    IsabellaSaginawMontcalm
    · Mich. Acts 1840, ann. sess., no. 119, secs. 1, 4, 33-35/pp. 196, 200
  5. 1850
    Changed Montcalm fully organized, detached from Ionia.
    Montcalm
    · Mich. Acts 1850, ann. sess., no. 129/p. 114

Land and parcels

What the maps cover in Ionia

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

Ionia by the Census

Population
66,804 2020 Census count
Housing units
24,638 2020 Census count
Land area
571 square miles
Water area
8.7 square miles
People per sq mi
117 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.

Permits

County government

See your own lot on these maps

Open Ionia 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.

Open the free map no sign-in Pro early access

Questions

Common questions about Ionia County

When was Ionia County founded?
Ionia County was founded in 1831, formed from Michilimackinac County, Mackinac County and Kalamazoo County, and named after Ionia.
What is the county seat of Ionia County?
The county seat of Ionia County is Ionia.
Is there an online parcel map for Ionia County?
Yes. Ionia County publishes a parcel map of 31,527 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Ionia County's boundary or name changed?
Ionia County was created in 1831 from Michilimackinac County, Mackinac County and Kalamazoo County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Kent County, Montcalm County and Isabella County.
Is my lot in a flood zone?
We do not have flood maps for Ionia 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