When was Lapeer County founded?

Lapeer County was founded in 1822, formed from Oakland County and St. Clair County.

What is the county seat of Lapeer County?

The county seat of Lapeer County is Lapeer.

Is there an online parcel map for Lapeer County?

Yes. Lapeer County publishes a parcel map of 43,573 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Lapeer County's boundary or name changed?

Lapeer County was created in 1822 from Oakland County and St. Clair County. Since then the Atlas of Historical County Boundaries records 7 later changes, chiefly involving Tuscola County, Genesee County and Sanilac County.

Is my lot in a flood zone?

We do not have flood maps for Lapeer County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 26087

Lapeer CountyMichigan

Lapeer County is a county in Michigan with its seat in Lapeer, formed in 1822.

Founded1822
County seatLapeer
Land area647 sq mi + 16 sq mi water
Population88,619 2020 Census
Parcels mapped43,573 checked 15 October 2026

Open the free map Click any parcel in Lapeer County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 19 October 2026

Census outline · seat marked

History

Formed in 1822 from Oakland County and St. Clair County

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

Lapeer was created in 1822 by Michigan Territory from Oakland and St. Clair counties, though it was initially attached to Oakland for administrative and judicial purposes. Lapeer was fully organized and detached from Oakland in 1835, but immediately lost territory to the creation of Genesee County that same year. Over the following decades, Lapeer experienced multiple boundary adjustments, losing land to Genesee, Huron, Tuscola, and Sanilac counties, and exchanging territory with Tuscola County in 1855.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

1822
Lapeer County created Lapeer created by Michigan Territory from Oakland, St. Clair, and a small piece of Non-County Area 2 attached to Oakland; Lapeer not fully organized, attached to Oakland for administrative and judicial purposes.
from Oakland from St. Clair
10 September 1822 · Terr. Papers U.S., 11: 310-311
1835
Lost territory Lapeer lost to creation of Genesee.
to Genesee
28 March 1835 · Mich. Terr. Laws, 3:1416
1840
Lost territory Lapeer lost part of Sanilac attachment to creation of Huron and Tuscola; remainder of Sanilac detached from Lapeer, re-attached to St. Clair "for judicial purposes."
to Sanilac to Huron to Tuscola to St. Clair
1 April 1840 · Mich. Acts 1840, ann. sess., no. 119, secs. 1, 4, 33-35/pp. 196, 200
1843
Lost territory Lapeer lost to Genesee.
to Genesee
31 March 1843 · Mich. Acts 1843, ann. sess., no. 85/p. 189
1845
Lost territory Lapeer lost to Tuscola.
to Tuscola
19 March 1845 · Mich. Acts 1845, ann. sess., no. 42, secs. 1, 25/pp. 49, 53

Show all 8 changes (3 more)

1822
Lapeer County created Lapeer created by Michigan Territory from Oakland, St. Clair, and a small piece of Non-County Area 2 attached to Oakland; Lapeer not fully organized, attached to Oakland for administrative and judicial purposes.
from Oakland from St. Clair
10 September 1822 · Terr. Papers U.S., 11: 310-311
1835
Changed Lapeer fully organized, detached from Oakland.
Oakland
2 February 1835 · Mich. Terr. Laws, 3:1348
1835
Lost territory Lapeer lost to creation of Genesee.
to Genesee
28 March 1835 · Mich. Terr. Laws, 3:1416
1836
Changed Part of Sanilac detached from St. Clair, attached to Lapeer "for judicial purposes."
Sanilac St. Clair
28 March 1836 · Mich. Acts 1836, ann. sess., p. 67
1840
Lost territory Lapeer lost part of Sanilac attachment to creation of Huron and Tuscola; remainder of Sanilac detached from Lapeer, re-attached to St. Clair "for judicial purposes."
to Sanilac to Huron to Tuscola to St. Clair
1 April 1840 · Mich. Acts 1840, ann. sess., no. 119, secs. 1, 4, 33-35/pp. 196, 200
1843
Lost territory Lapeer lost to Genesee.
to Genesee
31 March 1843 · Mich. Acts 1843, ann. sess., no. 85/p. 189
1845
Lost territory Lapeer lost to Tuscola.
to Tuscola
19 March 1845 · Mich. Acts 1845, ann. sess., no. 42, secs. 1, 25/pp. 49, 53
1855
Exchanged territory Lapeer exchanged with Tuscola.
with Tuscola
13 February 1855 · Mich. Acts 1855, reg. sess., no. 144/p. 313

Land and parcels

What the maps cover in Lapeer

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

Parcels Good enough

Lot lines and tax-map numbers for 43,573 parcels from Lapeer County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 15 August 2025 · checked 15 October 2026
Address points Missing

No public address points layer found for Lapeer County yet.
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

Lapeer by the Census

Population

88,619 2020 Census count

Housing units

36,725 2020 Census count

Land area

647 square miles

Water area

16 square miles

People per sq mi

137 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

Lapeer 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 Lapeer County.
lapeercountyweb.org

See your own lot on these maps

Open Lapeer 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 Lapeer County

When was Lapeer County founded?: Lapeer County was founded in 1822, formed from Oakland County and St. Clair County.
What is the county seat of Lapeer County?: The county seat of Lapeer County is Lapeer.
Is there an online parcel map for Lapeer County?: Yes. Lapeer County publishes a parcel map of 43,573 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Lapeer County's boundary or name changed?: Lapeer County was created in 1822 from Oakland County and St. Clair County. Since then the Atlas of Historical County Boundaries records 7 later changes, chiefly involving Tuscola County, Genesee County and Sanilac County.
Is my lot in a flood zone?: We do not have flood maps for Lapeer County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby