Island Lake is a village in Lake and McHenry counties in the U.S. state of Illinois. The population was 8,080 at the 2010 census. The village surrounds Island Lake, a lake which contains a small island.
The village was incorporated on June 25, 1952.
Island Lake is a village located at 42°16′40″N 88°12′3″W (42.277691, -88.200747), lying in the northwest Chicago suburbs.
According to the 2010 census, Island Lake has a total area of 3.597 square miles (9.32 km2), of which 3.39 square miles (8.78 km2) (or 94.25%) is land and 0.207 square miles (0.54 km2) (or 5.75%) is water.
As of the census of 2000, there were 8,153 people, 2,837 households, and 2,150 families living in the village. The population density was 2,856.3 inhabitants per square mile (1,104.5/km2). There were 2,893 housing units at an average density of 1,013.5 per square mile (391.9/km2). The racial makeup of the village was 93.79% White, 0.49% African American, 0.16% Native American, 1.62% Asian, 0.01% Pacific Islander, 2.72% from other races, and 1.20% from two or more races. 8.33% of the population were Hispanic or Latino of any race.
There were 2,837 households, out of which 46.8% had children under the age of 18 living with them, 63.8% were married couples living together, 8.6% had a female householder with no husband present, and 24.2% were non-families.