Grand Isle is located in Maine. Grand Isle, Maine has a population of 473. Grand Isle is less family-centric than the surrounding county with 15.28% of the households containing married families with children. The county average for households married with children is 25.18%.
The median household income in Grand Isle, Maine is $29,643. The median household income for the surrounding county is $39,021 compared to the national median of $57,652. The median age of people living in Grand Isle is 56.2 years.
The average high temperature in July is 74 degrees, with an average low temperature in January of 0.7 degrees. The average rainfall is approximately 38.7 inches per year, with 86.5 inches of snow per year.