County outline
Where Windham County is located
Area breakdown
Land accounts for 98.4% of Windham County’s measured area and water for 1.6%. Its combined area converts to 2,068.5 square kilometers or approximately 511,144 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 785.953 | 2,035.609 | 503,009.9 |
| Water | 12.709 | 32.916 | 8,133.8 |
| Total | 798.662 | 2,068.525 | 511,143.7 |
How Windham County compares
By original Census land area, Windham County ranks #3 of 14 in Vermont and #1099 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.155 times the Vermont county-equivalent median of 680.6 square miles. It accounts for 8.5% of the combined county land area in the state.
See the complete Vermont ranking · What counts as a county equivalent?
Population and density of Windham County
The Census Bureau estimates that 45,204 people lived in Windham County on July 1, 2025. That ranks #1,108 of 3,222 county equivalents nationally and #6 of 14 in Vermont. Since the April 1, 2020 estimates base of 45,909, the population has declined by 705 (−1.5%), compared with +0.2% for Vermont as a whole.
With 786 square miles of land, that is 58 people per square mile (22 per km²), placing Windham County #1,421 nationally for density and #7 in Vermont. The median county equivalent has 47 people per square mile; the Vermont median is 57. Put another way, there are about 11 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 45,858 | 46,168 | 45,925 | 45,923 | 45,479 | 45,204 |
| Change | — | +310 | −243 | −2 | −444 | −275 |
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 Windham County
Windham County is divided into 23 cities and towns. In Vermont, county subdivisions are local governments, and together they cover all of the county’s land and residents.
The most populous is Brattleboro town, with 11,872 residents (26.3% of the county). The largest by land is Jamaica town, at 48.9 mi², or 6.2% of the county’s land. The county seat, Newfane town, has 1,636 residents. Among those with at least 1,000 residents in 2020, Marlboro town grew fastest since then (+3%).
| County subdivision | Population 2025 | Since 2020 | Land mi² | Share of county land |
|---|---|---|---|---|
| Brattleboro town | 11,872 | −2.6% | 32.1 | 4.1% |
| Rockingham town | 4,697 | −3% | 41.4 | 5.3% |
| Westminster town | 2,932 | −1.9% | 45 | 5.7% |
| Putney town | 2,575 | −1.6% | 26.7 | 3.4% |
| Wilmington town | 2,280 | +1.2% | 40.5 | 5.1% |
| Vernon town | 2,144 | −1.8% | 19.4 | 2.5% |
| Guilford town | 2,082 | −2% | 39.5 | 5% |
| Londonderry town | 1,897 | −1% | 35.5 | 4.5% |
| Dummerston town | 1,859 | −0.7% | 30.7 | 3.9% |
| Dover town | 1,827 | +1.5% | 35.8 | 4.6% |
| Marlboro town | 1,776 | +3% | 40.3 | 5.1% |
| Newfane townCounty seat | 1,636 | −0.8% | 39.8 | 5.1% |
| Whitingham town | 1,336 | −0.4% | 36.8 | 4.7% |
| Townshend town | 1,259 | −1.9% | 42.3 | 5.4% |
| Jamaica town | 979 | −2.1% | 48.9 | 6.2% |
Show the other 8 subdivisions
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Wardsboro town | 854 | −2.1% | 29.2 |
| Halifax town | 749 | −3.7% | 39.7 |
| Grafton town | 631 | −1.7% | 38.1 |
| Brookline town | 531 | −2.2% | 12.9 |
| Windham town | 455 | +1.1% | 26.1 |
| Stratton town | 440 | −0.7% | 46 |
| Athens town | 389 | −1.8% | 14 |
| Somerset town | 4 | 0% | 25.3 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Windham County. Land: 2026 Census Gazetteer. How communities are listed.
Metropolitan area
Windham County is a central county of the Brattleboro, VT Micropolitan Statistical Area. Windham County is the area’s only county equivalent, so the micro area has the same 786 square miles of land. By combined land it ranks #272 of 542 micropolitan areas, and #272 by population. It belongs to the Keene-Brattleboro, NH-VT Combined Statistical Area.
ZIP codes
26 ZIP Code Tabulation Areas have land in Windham County; 25 of them have most of their land inside the county, and the others mainly cover neighboring areas.
0510105141051430514605148051540515505158053010534105342053430534405345053460535105353053540535505356053580535905360053610536205363
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 Windham County
Windham County shares a land border with 5 county equivalents, including 3 in New Hampshire and Massachusetts. It has more land than 4 of them. The largest neighbor is Windsor County (969.1 mi²) and the smallest is Sullivan County (537.9 mi²). Together with its neighbors, Windham County forms a block of 4,373.2 mi² of land, of which it holds 18%.
| Bordering county equivalent | Land mi² | Size vs. Windham | Compare |
|---|---|---|---|
| Windsor County | 969.1 | 1.2× larger | Compare |
| Cheshire CountyNew Hampshire | 706.7 | 1.1× smaller | Compare |
| Franklin CountyMassachusetts | 699.2 | 1.1× smaller | Compare |
| Bennington County | 674.2 | 1.2× smaller | Compare |
| Sullivan CountyNew Hampshire | 537.9 | 1.5× smaller | Compare |
How big is Windham County compared with U.S. states?
Windham County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.3 times as much. Vermont’s county land could hold about 12 areas the size of Windham County.
Another way to picture it: the same land area would fill a square about 28 miles (45.1 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 Windham County?
Windham County has more land than 2,123 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 Windham County at #1,187 nationally by total area, 88 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 1.6%, 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 Windham County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1098 | Pike County, Kentucky | 786.2 | Compare |
| #1099 | Windham County, Vermont | 786 | This county |
| #1100 | Greenville County, South Carolina | 785.9 | 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 42.995278, -72.721867. 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: 2,035,607,585 m²; AWATER: 32,917,188 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 Windham County?
Windham County, Vermont has 786 square miles (2,035.6 km²) of land and 12.7 square miles of water, for a total area of 798.7 square miles. It ranks #1099 of 3,222 U.S. county equivalents by land area.
Is Windham County the largest county in Vermont?
No. Windham County ranks #3 of 14 in Vermont by land area. The largest is Windsor County, with 969.1 square miles of land.
What counties border Windham County?
Windham County shares a land border with Bennington County, Cheshire County, New Hampshire, Franklin County, Massachusetts, Windsor County, and Sullivan County, New Hampshire.
What is the population of Windham County?
The Census Bureau estimates Windham County had 45,204 residents on July 1, 2025, ranking #1,108 of 3,222 county equivalents. That is 58 people per square mile of land.
What is the county seat of Windham County?
The county seat of Windham County is Newfane.
What cities and towns are in Windham County?
Windham County has 23 county subdivisions (cities, towns and townships). The most populous five are Brattleboro town, Rockingham town, Westminster town, Putney town, and Wilmington town.
Is Windham County part of a metropolitan area?
Yes. It is a central county of the Brattleboro, VT Micropolitan Statistical Area.
How many ZIP codes are in Windham County?
26 ZIP Code Tabulation Areas have land in Windham County, and 25 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Windham County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.3 times as much land.
How many acres of land are in Windham County?
The land measurement converts to approximately 503,010 acres. Including water, total area is approximately 511,144 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.