County outline
Where Door County is located
Area breakdown
Land accounts for 20.3% of Door County’s measured area and water for 79.7%. Its combined area converts to 6,138.9 square kilometers or approximately 1,516,950 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 481.936 | 1,248.209 | 308,439 |
| Water | 1,888.299 | 4,890.672 | 1,208,511.4 |
| Total | 2,370.235 | 6,138.88 | 1,516,950.4 |
How Door County compares
By original Census land area, Door County ranks #59 of 72 in Wisconsin and #2151 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.64 times the Wisconsin county-equivalent median of 753 square miles. It accounts for 0.9% of the combined county land area in the state.
See the complete Wisconsin ranking · What counts as a county equivalent?
Population and density of Door County
The Census Bureau estimates that 30,616 people lived in Door County on July 1, 2025. That ranks #1,466 of 3,222 county equivalents nationally and #44 of 72 in Wisconsin. Since the April 1, 2020 estimates base of 30,073, the population has grown by 543 (+1.8%), compared with +1.3% for Wisconsin as a whole.
With 481.9 square miles of land, that is 64 people per square mile (25 per km²), placing Door County #1,344 nationally for density and #31 in Wisconsin. The median county equivalent has 47 people per square mile; the Wisconsin median is 51. Put another way, there are about 10 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 30,128 | 30,447 | 30,629 | 30,581 | 30,581 | 30,616 |
| Change | — | +319 | +182 | −48 | 0 | +35 |
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 Door County
Door County is divided into 19 cities and towns. In Wisconsin, county subdivisions are local governments, and together they cover all of the county’s land and residents.
The most populous is Sturgeon Bay city, with 9,917 residents (32.4% of the county). The largest by land is Liberty Grove town, at 53.5 mi², or 11.1% of the county’s land. Among those with at least 1,000 residents in 2020, Egg Harbor town grew fastest since then (+6.9%).
| County subdivision | Population 2025 | Since 2020 | Land mi² | Share of county land |
|---|---|---|---|---|
| Sturgeon Bay cityCounty seat | 9,917 | +2.7% | 9.959 | 2.1% |
| Sevastopol town | 2,835 | +0.1% | 51.7 | 10.7% |
| Liberty Grove town | 2,130 | +1.9% | 53.5 | 11.1% |
| Nasewaupee town | 2,028 | +2.5% | 42.6 | 8.8% |
| Egg Harbor town | 1,562 | +6.9% | 36.1 | 7.5% |
| Gibraltar town | 1,288 | +4.4% | 33.8 | 7% |
| Baileys Harbor town | 1,258 | +3% | 29.5 | 6.1% |
| Gardner town | 1,228 | +0.2% | 34.3 | 7.1% |
| Sister Bay village | 1,177 | +2.3% | 2.731 | 0.6% |
| Brussels town | 1,089 | −2.8% | 36 | 7.5% |
| Forestville town | 1,056 | −0.8% | 35.3 | 7.3% |
| Union town | 998 | −0.8% | 21.2 | 4.4% |
| Jacksonport town | 882 | +1.3% | 28.9 | 6% |
| Sturgeon Bay townCounty seat | 809 | −1.7% | 19.3 | 4% |
| Washington town | 780 | 0% | 25.5 | 5.3% |
Show the other 4 subdivisions
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Forestville village | 460 | −4% | 0.526 |
| Egg Harbor village | 395 | +10.3% | 2.463 |
| Clay Banks town | 376 | −0.3% | 14.8 |
| Ephraim village | 348 | +1.2% | 3.787 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Door County. Land: 2026 Census Gazetteer. How communities are listed.
Metropolitan area
Door County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.
ZIP codes
13 ZIP Code Tabulation Areas have land in Door County; 10 of them have most of their land inside the county, and the others mainly cover neighboring areas.
54201542025420454205542095421054211542125421354217542345423554246
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 Door County
Door County shares a land border with 1 county equivalent. It has 1.4 times the land area of Kewaunee County.
| Bordering county equivalent | Land mi² | Size vs. Door | Compare |
|---|---|---|---|
| Kewaunee County | 342.5 | 1.4× smaller | Compare |
How big is Door County compared with U.S. states?
Door County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.1 times as much. Wisconsin’s county land could hold about 112 areas the size of Door County.
Another way to picture it: the same land area would fill a square about 22 miles (35.3 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 Door County?
Door County has more land than 1,071 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 Door County at #255 nationally by total area, 1,896 places closer to the top than its land rank. The water assigned to this geography moves it ahead of some county equivalents with more land.
Its water share is 79.7%, compared with a national county-equivalent median of 1.2% — 78.5 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 Door County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #2150 | Rock County, Minnesota | 482.5 | Compare |
| #2151 | Door County, Wisconsin | 481.9 | This county |
| #2152 | Bristol Bay Borough, Alaska | 481.4 | 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 45.093417, -87.048683. 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: 1,248,209,712 m²; AWATER: 4,890,672,385 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 Door County?
Door County, Wisconsin has 481.9 square miles (1,248.2 km²) of land and 1,888.3 square miles of water, for a total area of 2,370.2 square miles. It ranks #2151 of 3,222 U.S. county equivalents by land area.
Is Door County the largest county in Wisconsin?
No. Door County ranks #59 of 72 in Wisconsin by land area. The largest is Marathon County, with 1,545.2 square miles of land.
What counties border Door County?
Door County shares a land border with Kewaunee County.
What is the population of Door County?
The Census Bureau estimates Door County had 30,616 residents on July 1, 2025, ranking #1,466 of 3,222 county equivalents. That is 64 people per square mile of land.
What is the county seat of Door County?
The county seat of Door County is Sturgeon Bay.
What cities and towns are in Door County?
Door County has 19 county subdivisions (cities, towns and townships). The most populous five are Sturgeon Bay city, Sevastopol town, Liberty Grove town, Nasewaupee town, and Egg Harbor town.
Is Door County part of a metropolitan area?
No. Door County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Door County?
13 ZIP Code Tabulation Areas have land in Door County, and 10 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Door County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 2.1 times as much land.
How many acres of land are in Door County?
The land measurement converts to approximately 308,439 acres. Including water, total area is approximately 1,516,950 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.