Grand Isle County area

Population and density of Grand Isle County

The Census Bureau estimates that 7,511 people lived in Grand Isle County on July 1, 2025. That ranks #2,691 of 3,222 county equivalents nationally and #13 of 14 in Vermont. Since the April 1, 2020 estimates base of 7,293, the population has grown by 218 (+3%), compared with +0.2% for Vermont as a whole.

With 81.8 square miles of land, that is 92 people per square mile (35 per km²), placing Grand Isle County #1,054 nationally for density and #2 in Vermont. The median county equivalent has 47 people per square mile; the Vermont median is 57. Put another way, there are about 7 acres of land per resident.

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 Grand Isle County

Grand Isle County is divided into 5 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 Grand Isle town, with 2,172 residents (28.9% of the county). The largest by land is Alburgh town, at 29.1 mi², or 35.6% of the county’s land. The county seat, North Hero town, has 970 residents. Among those with at least 1,000 residents in 2020, Grand Isle town grew fastest since then (+4.2%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Grand Isle County. Land: 2026 Census Gazetteer. How communities are listed.

Metropolitan area

Grand Isle County is an outlying county of the Burlington-South Burlington, VT Metropolitan Statistical Area. Its 3 county equivalents have 227,803 residents on 1,249.6 square miles of land; Grand Isle County accounts for 6.5% of the land and 3.3% of the residents. By combined land it ranks #250 of 393 metropolitan areas, and #216 by population. It belongs to the Burlington-South Burlington-Barre, VT Combined Statistical Area.

ZIP codes

5 ZIP Code Tabulation Areas have land in Grand Isle County, and each lies mostly inside the county.

0544005458054630547405486

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Grand Isle County

Grand Isle County shares a land border with 3 county equivalents, including 1 in New York. Each of them has more land than Grand Isle County. The largest neighbor is Clinton County (1,037.8 mi²) and the smallest is Chittenden County (536.9 mi²). Together with its neighbors, Grand Isle County forms a block of 2,287.4 mi² of land, of which it holds 3.6%.

How big is Grand Isle County compared with U.S. states?

Grand Isle County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 13 times as much. Vermont’s county land could hold about 113 areas the size of Grand Isle County.

Another way to picture it: the same land area would fill a square about 9.04 miles (14.6 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 Grand Isle County?

Grand Isle County has more land than 125 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 Grand Isle County at #3,035 nationally by total area, 62 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 57.7%, compared with a national county-equivalent median of 1.2% — 56.5 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 Grand Isle County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

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.