Isle au Haut is a town in Knox County, Maine, home to about 69 people across 13 square miles. Its ZIP code is 04645.
All in Isle au Haut
We’re writing up Isle au Haut’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Isle au Haut well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Portland International Jetport (PWM)89 miles away |
|---|---|
| Closer regional airport | Knox County Regional Airport (RKD)24 miles away |
| Nearest city of 250,000+ | Boston, MA169 miles away |
| Nearest city of 1 million+ | New York, NY359 miles away |
Straight-line distances from the center of Isle au Haut; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Isle au Haut had 92 residents in the 2020 census, up 16% since 2000.
It’s the 492nd largest of 519 towns in Maine by population.
Knox County grew from 30,406 residents in 1900 to 40,607 in 2020.
Knox County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 77°F in summer, and winter lows average 12°F. About 56.3 inches of rain and melted snow fall in a typical year, with about 69 inches of snow.
Source: NOAA 1991–2020 climate normals, W Rockport 1 Nnw, ME weather station (28 miles away).
14,502 jobs at 1,823 businesses in Knox County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
2 doctors and other health care providers list an office in Isle au Haut.
Nearest hospitals
Providers with an office here
| Mental health providers | 2 |
|---|
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (2 nearby)
Libraries (1 nearby)
Counts are within about 2.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Isle Au Haut Public Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Isle au Haut Rural SchoolIsle Au Haut | Pre-K–8 | 7 | Public | 1.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
Buying or selling around Isle au Haut? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.