The total population of Isle au Haut town is estimated to be 43 with 28 males (65.12%) and 15 females (34.88%). There are 13 less females than males in Isle au Haut town.
In 2022, the population of Isle au Haut town was 87, a 1.14% decrease year-by-year from 2021. Previously, in 2021, Isle au Haut town's population was 88, an increase of 1.15% compared to a population of 87 in 2020.
The median age in Isle au Haut, Maine is 70.3, as per 2021 ACS 5-Year Estimates. Of the total population, 0.00% were under the age of 15, 13.33% aged 15 to 29, 0.00% aged 30 to 64, 86.67% aged 65 to 84, and 0.00% were 85 years of age and older.