Isle au Haut
- County:
- Knox County
- County Seat:
- No
- Area (mi²):
- 12.521
- State:
- Maine
Isle au Haut is located in Knox County, Maine. Isle au Haut has a 2025 population of 85 . Isle au Haut is currently declining at a rate of -1.16% annually and its population has decreased by -1.16% since the most recent census, which recorded a population of 86 in 2020.
The median age in Isle au Haut is 71.4 years: 71.5 years for males, and 71.4 years for females. For every 100 females there are 118.5 males.