Simonton Lake is a census-designated place (CDP) in Elkhart County, Indiana, United States.

[8] As of the census[4] of 2000, there were 4,053 people, 1,567 households, and 1,181 families residing in the CDP.

There were 1,636 housing units at an average density of 501.7 per square mile (193.7/km2).

There were 1,567 households, out of which 31.8% had children under the age of 18 living with them, 64.2% were married couples living together, 7.4% had a female householder with no husband present, and 24.6% were non-families.

19.5% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older.