County outline
Where Lapeer County is located
Area breakdown
Land accounts for 97.7% of Lapeer County’s measured area and water for 2.3%. Its combined area converts to 1,716.8 square kilometers or approximately 424,220 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 647.475 | 1,676.953 | 414,384 |
| Water | 15.369 | 39.806 | 9,836.2 |
| Total | 662.844 | 1,716.758 | 424,220.2 |
How Lapeer County compares
By original Census land area, Lapeer County ranks #32 of 83 in Michigan and #1459 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.14 times the Michigan county-equivalent median of 567.8 square miles. It accounts for 1.1% of the combined county land area in the state.
See the complete Michigan ranking · What counts as a county equivalent?
Population and density of Lapeer County
The Census Bureau estimates that 89,516 people lived in Lapeer County on July 1, 2025. That ranks #677 of 3,222 county equivalents nationally and #23 of 83 in Michigan. Since the April 1, 2020 estimates base of 88,628, the population has grown by 888 (+1%), compared with +0.5% for Michigan as a whole.
With 647.5 square miles of land, that is 138 people per square mile (53 per km²), placing Lapeer County #814 nationally for density and #24 in Michigan. The median county equivalent has 47 people per square mile; the Michigan median is 62. Put another way, there are about 4.6 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 88,595 | 88,714 | 88,705 | 89,038 | 89,275 | 89,516 |
| Change | — | +119 | −9 | +333 | +237 | +241 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Lapeer County
Lapeer County is divided into 21 municipalities and townships. In Michigan, county subdivisions are local governments, and together they cover all of the county’s land and residents.
The most populous is Lapeer city, with 9,201 residents (10.3% of the county). The largest by land is Burnside township, at 53.4 mi², or 8.2% of the county’s land. Among those with at least 1,000 residents in 2020, Metamora township grew fastest since then (+4.5%).
| County subdivision | Population 2025 | Since 2020 | Land mi² | Share of county land |
|---|---|---|---|---|
| Lapeer cityCounty seat | 9,201 | +1.7% | 7.346 | 1.1% |
| Mayfield township | 8,070 | +1.1% | 33.8 | 5.2% |
| Almont township | 7,103 | +2.1% | 36.8 | 5.7% |
| Deerfield township | 5,802 | +0.7% | 35.6 | 5.5% |
| Oregon township | 5,722 | +0.3% | 32.6 | 5% |
| Elba township | 5,256 | +0.4% | 31.7 | 4.9% |
| Lapeer townshipCounty seat | 4,996 | +0.7% | 30.2 | 4.7% |
| Dryden township | 4,809 | +0.2% | 35.5 | 5.5% |
| Attica township | 4,729 | +0.5% | 35.3 | 5.4% |
| Metamora township | 4,573 | +4.5% | 34.6 | 5.3% |
| Hadley township | 4,555 | +0.2% | 35 | 5.4% |
| Marathon township | 4,444 | −0.4% | 33 | 5.1% |
| Imlay City city | 3,753 | +1.7% | 2.848 | 0.4% |
| North Branch township | 3,557 | −0.2% | 36.1 | 5.6% |
| Imlay township | 3,192 | +2% | 33.1 | 5.1% |
Show the other 6 subdivisions
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Arcadia township | 3,174 | +0.7% | 35.1 |
| Burnside township | 1,917 | +0.7% | 53.4 |
| Goodland township | 1,739 | +0.3% | 35.6 |
| Rich township | 1,502 | +0.3% | 35 |
| Burlington township | 1,419 | +0.5% | 35 |
| Brown City city | 3 | 0% | 0.04 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Lapeer County. Land: 2026 Census Gazetteer. How communities are listed.
Metropolitan area
Lapeer County is an outlying county of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area, in the Warren-Troy-Farmington Hills, MI metropolitan division. Its 6 county equivalents have 4,390,913 residents on 3,892.9 square miles of land; Lapeer County accounts for 16.6% of the land and 2% of the residents. By combined land it ranks #75 of 393 metropolitan areas, and #14 by population. It belongs to the Detroit-Warren-Ann Arbor, MI Combined Statistical Area.
| County equivalent | Population 2025 | Land mi² |
|---|---|---|
| Wayne County | 1,769,038 | 611.8 |
| Oakland County | 1,288,337 | 867.4 |
| Macomb County | 886,221 | 479.4 |
| Livingston County | 197,315 | 565.3 |
| St. Clair County | 160,486 | 721.5 |
| Lapeer County | 89,516 | 647.5 |
ZIP codes
22 ZIP Code Tabulation Areas have land in Lapeer County; 12 of them have most of their land inside the county, and the others mainly cover neighboring areas.
48003480144837148412484164842148423484284843548438484404844448446484534845548461484624846348464487274874448760
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Lapeer County
Lapeer County shares a land border with 6 county equivalents. It has more land than 2 of them. The largest neighbor is Sanilac County (962.6 mi²) and the smallest is Macomb County (479.4 mi²). Together with its neighbors, Lapeer County forms a block of 5,120.2 mi² of land, of which it holds 12.6%.
| Bordering county equivalent | Land mi² | Size vs. Lapeer | Compare |
|---|---|---|---|
| Sanilac County | 962.6 | 1.5× larger | Compare |
| Oakland County | 867.4 | 1.3× larger | Compare |
| Tuscola County | 804.9 | 1.2× larger | Compare |
| St. Clair County | 721.5 | 1.1× larger | Compare |
| Genesee County | 636.9 | about the same | Compare |
| Macomb County | 479.4 | 1.4× smaller | Compare |
How big is Lapeer County compared with U.S. states?
Lapeer County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.6 times as much. Michigan’s county land could hold about 87 areas the size of Lapeer County.
Another way to picture it: the same land area would fill a square about 25.4 miles (41 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Lapeer County?
Lapeer County has more land than 1,763 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Lapeer County at #1,532 nationally by total area, 73 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.
Its water share is 2.3%, compared with a national county-equivalent median of 1.2% — 1.1 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Lapeer County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1458 | Prairie County, Arkansas | 647.5 | Compare |
| #1459 | Lapeer County, Michigan | 647.5 | This county |
| #1460 | Perry County, Mississippi | 647.3 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 43.088633, -83.224325. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 1,676,952,446 m²; AWATER: 39,806,092 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Lapeer County?
Lapeer County, Michigan has 647.5 square miles (1,677 km²) of land and 15.4 square miles of water, for a total area of 662.8 square miles. It ranks #1459 of 3,222 U.S. county equivalents by land area.
Is Lapeer County the largest county in Michigan?
No. Lapeer County ranks #32 of 83 in Michigan by land area. The largest is Marquette County, with 1,809.1 square miles of land.
What counties border Lapeer County?
Lapeer County shares a land border with Genesee County, Tuscola County, St. Clair County, Oakland County, Sanilac County, and Macomb County.
What is the population of Lapeer County?
The Census Bureau estimates Lapeer County had 89,516 residents on July 1, 2025, ranking #677 of 3,222 county equivalents. That is 138 people per square mile of land.
What is the county seat of Lapeer County?
The county seat of Lapeer County is Lapeer.
What cities and towns are in Lapeer County?
Lapeer County has 21 county subdivisions (cities, towns and townships). The most populous five are Lapeer city, Mayfield township, Almont township, Deerfield township, and Oregon township.
Is Lapeer County part of a metropolitan area?
Yes. It is an outlying county of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area, which has 6 county equivalents and 4,390,913 residents.
How many ZIP codes are in Lapeer County?
22 ZIP Code Tabulation Areas have land in Lapeer County, and 12 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Lapeer County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.6 times as much land.
How many acres of land are in Lapeer County?
The land measurement converts to approximately 414,384 acres. Including water, total area is approximately 424,220 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.