County outline
Where Lenawee County is located
Area breakdown
Land accounts for 98.5% of Lenawee County’s measured area and water for 1.5%. Its combined area converts to 1,972 square kilometers or approximately 487,297 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 749.653 | 1,941.592 | 479,777.9 |
| Water | 11.749 | 30.43 | 7,519.4 |
| Total | 761.402 | 1,972.022 | 487,297.3 |
How Lenawee County compares
By original Census land area, Lenawee County ranks #23 of 83 in Michigan and #1176 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.32 times the Michigan county-equivalent median of 567.8 square miles. It accounts for 1.3% of the combined county land area in the state.
See the complete Michigan ranking · What counts as a county equivalent?
Population and density of Lenawee County
The Census Bureau estimates that 97,779 people lived in Lenawee County on July 1, 2025. That ranks #644 of 3,222 county equivalents nationally and #21 of 83 in Michigan. Since the April 1, 2020 estimates base of 99,434, the population has declined by 1,655 (−1.7%), compared with +0.5% for Michigan as a whole.
With 749.7 square miles of land, that is 130 people per square mile (50 per km²), placing Lenawee County #836 nationally for density and #25 in Michigan. The median county equivalent has 47 people per square mile; the Michigan median is 62. Put another way, there are about 4.9 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 99,348 | 99,181 | 98,296 | 97,710 | 97,825 | 97,779 |
| Change | — | −167 | −885 | −586 | +115 | −46 |
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 Lenawee County
Lenawee County is divided into 26 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 Adrian city, with 20,191 residents (20.6% of the county). The largest by land is Medina township, at 47.5 mi², or 6.3% of the county’s land. Among those with at least 1,000 residents in 2020, Riga township grew fastest since then (+15.3%).
| County subdivision | Population 2025 | Since 2020 | Land mi² | Share of county land |
|---|---|---|---|---|
| Adrian cityCounty seat | 20,191 | −2.2% | 8.007 | 1.1% |
| Tecumseh city | 8,608 | −0.7% | 5.649 | 0.8% |
| Raisin township | 8,165 | +3.3% | 36.2 | 4.8% |
| Madison charter township | 7,538 | −10.6% | 30.4 | 4.1% |
| Adrian townshipCounty seat | 6,322 | −1.3% | 33.9 | 4.5% |
| Cambridge township | 5,763 | +0.6% | 31.9 | 4.3% |
| Blissfield township | 3,836 | −2.2% | 20.9 | 2.8% |
| Clinton township | 3,700 | −1.6% | 18.2 | 2.4% |
| Woodstock township | 3,578 | −0.9% | 33.9 | 4.5% |
| Franklin township | 3,047 | −0.7% | 38.3 | 5.1% |
| Rollin township | 3,020 | −0.6% | 33.7 | 4.5% |
| Hudson city | 2,347 | −3% | 2.192 | 0.3% |
| Morenci city | 2,218 | −2.5% | 2.12 | 0.3% |
| Tecumseh township | 2,014 | −1.2% | 12.6 | 1.7% |
| Palmyra township | 1,999 | −1.6% | 36.5 | 4.9% |
Show the other 11 subdivisions
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Rome township | 1,780 | −2.2% | 35.9 |
| Fairfield township | 1,647 | −1.2% | 42.1 |
| Dover township | 1,645 | −1% | 35.1 |
| Hudson township | 1,505 | +0.6% | 35.4 |
| Riga township | 1,489 | +15.3% | 40.9 |
| Ridgeway township | 1,484 | −3.1% | 28.7 |
| Deerfield township | 1,471 | −2.1% | 25 |
| Macon township | 1,314 | −1.4% | 32.6 |
| Seneca township | 1,116 | −2.4% | 40.1 |
| Medina township | 1,086 | −2.9% | 47.5 |
| Ogden township | 896 | −2% | 42.1 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Lenawee County. Land: 2026 Census Gazetteer. How communities are listed.
Metropolitan area
Lenawee County is a central county of the Adrian, MI Micropolitan Statistical Area. Lenawee County is the area’s only county equivalent, so the micro area has the same 749.7 square miles of land. By combined land it ranks #288 of 542 micropolitan areas, and #40 by population. It belongs to the Detroit-Warren-Ann Arbor, MI Combined Statistical Area.
ZIP codes
23 ZIP Code Tabulation Areas have land in Lenawee County; 18 of them have most of their land inside the county, and the others mainly cover neighboring areas.
4817649220492214922849229492304923349235492364923849247492484925349256492654926749268492764927949286492874928849289
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 Lenawee County
Lenawee County shares a land border with 6 county equivalents, including 2 in Ohio. It has more land than every one of them. The largest neighbor is Washtenaw County (706 mi²) and the smallest is Lucas County (339.7 mi²). Together with its neighbors, Lenawee County forms a block of 4,050.2 mi² of land, of which it holds 18.5%.
| Bordering county equivalent | Land mi² | Size vs. Lenawee | Compare |
|---|---|---|---|
| Washtenaw County | 706 | 1.1× smaller | Compare |
| Jackson County | 701.9 | 1.1× smaller | Compare |
| Hillsdale County | 598.2 | 1.3× smaller | Compare |
| Monroe County | 549.4 | 1.4× smaller | Compare |
| Fulton CountyOhio | 405.5 | 1.8× smaller | Compare |
| Lucas CountyOhio | 339.7 | 2.2× smaller | Compare |
How big is Lenawee County compared with U.S. states?
Lenawee County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.4 times as much. Michigan’s county land could hold about 76 areas the size of Lenawee County.
Another way to picture it: the same land area would fill a square about 27.4 miles (44.1 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 Lenawee County?
Lenawee County has more land than 2,046 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 Lenawee County at #1,263 nationally by total area, 87 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 1.5%, compared with a national county-equivalent median of 1.2% — 0.4 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 Lenawee County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1175 | Chester County, Pennsylvania | 750.6 | Compare |
| #1176 | Lenawee County, Michigan | 749.7 | This county |
| #1177 | Cherokee County, Oklahoma | 749.1 | 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 41.896031, -84.074361. 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: 1,941,592,913 m²; AWATER: 30,430,811 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 Lenawee County?
Lenawee County, Michigan has 749.7 square miles (1,941.6 km²) of land and 11.7 square miles of water, for a total area of 761.4 square miles. It ranks #1176 of 3,222 U.S. county equivalents by land area.
Is Lenawee County the largest county in Michigan?
No. Lenawee County ranks #23 of 83 in Michigan by land area. The largest is Marquette County, with 1,809.1 square miles of land.
What counties border Lenawee County?
Lenawee County shares a land border with Hillsdale County, Monroe County, Fulton County, Ohio, Washtenaw County, Jackson County, and Lucas County, Ohio.
What is the population of Lenawee County?
The Census Bureau estimates Lenawee County had 97,779 residents on July 1, 2025, ranking #644 of 3,222 county equivalents. That is 130 people per square mile of land.
What is the county seat of Lenawee County?
The county seat of Lenawee County is Adrian.
What cities and towns are in Lenawee County?
Lenawee County has 26 county subdivisions (cities, towns and townships). The most populous five are Adrian city, Tecumseh city, Raisin township, Madison charter township, and Adrian township.
Is Lenawee County part of a metropolitan area?
Yes. It is a central county of the Adrian, MI Micropolitan Statistical Area.
How many ZIP codes are in Lenawee County?
23 ZIP Code Tabulation Areas have land in Lenawee County, and 18 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Lenawee County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.4 times as much land.
How many acres of land are in Lenawee County?
The land measurement converts to approximately 479,778 acres. Including water, total area is approximately 487,297 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.