Birch Island Real EstateBirch Island real estate listings include condos, townhomes, and single family homes for sale. Commercial properties are also available. If you see a property you’re interested in, contact a Birch Island real estate agent to arrange a tour today! Birch Island, Maine has a population of 10,261. The median household income in Birch Island, Maine is $58,125. The median household income for the surrounding county is $65,702 compared to the national median of $57,652. The median age of people living in Birch Island is 43.8 years. Birch Island WeatherThe average high temperature in July is 79.3 degrees, with an average low temperature in January of 10.1 degrees. The average rainfall is approximately 48.1 inches per year, with 57.6 inches of snow per year. Nearby Homes for Sale |