Wonder Lake is a village in McHenry County, Illinois, United States. It is a commuter village in the Chicago metropolitan area. The population was 3,973 at the 2020 census. However including surrounding unincorporated subdivisions, the population is estimated at 10,000. Geography Wonder Lake is located at (42.38427, -88.367814). According to the 2010 census, Wonder Lake has a total area of , of which (or 80.68%) is land and (or 19.32%) is water. Demographics As of the census of 2000, there were 1,345 people, 445 households, and 367 families residing in the village. The population density was . There were 488 housing units at an average density of . The racial makeup of the village was 97.17% White, 0.37% Black or African American, 0.07% Native American, 0.30% Asian, 1.12% from other races, and 0.97% from two or more races. Hispanic or Latino people of any race were 4.46% of the population. There were 445 households, out of which 45.2% had children under the age of 18 living with them, 69.4% were married couples living together, 9.0% had a female householder with no husband present, and 17.5% were non-families. 12.8% of all households were made up of individuals, and 3.8% had someone living alone who was 65 years of age or older. The average household size was 3.02 and the average family size was 3.32. In the village, the population was spread out, with 31.9% under the age of 18, 7.3% from 18 to 24, 33.5% from 25 to 44, 20.6% from 45 to 64, and 6.8% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 105.7 males. For every 100 females age 18 and over, there were 99.6 males. The median income for a household in the village was $59,712, and the median income for a family was $62,404. Males had a median income of $49,792 versus $27,500 for females. The per capita income for the village was $21,428. About 2.6% of families and 2.7% of the population were below the poverty line, including 3.3% of those under age 18 and 3.1% of those age 65 or over. Schools Harrison School District 36 serves kindergarten through 8th grade students living on the east Ssde of the village of Wonder Lake. The school mascot is the Hurricane. The school property is located directly east of Harrison-Benwell County Park. The east side