Koontz Lake is an unincorporated community and census-designated place in Starke and Marshall counties in Indiana. The community was devastated by tornadoes as part of the Palm Sunday Tornado Outbreak of 1965.

Geography

Koontz Lake is located in the northeast corner of Starke County. The east end of the lake and of the CDP are in western Marshall County. St. Joseph County borders the CDP to the north. Indiana State Road 23 passes through the community on the west side of the lake, leading north to Walkerton, the post office for Koontz Lake addresses, and south the same distance to U.S. Route 30 in Grovertown.

According to the United States Census Bureau, the CDP has a total area of , of which are land and , or 12.90%, are water.

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2020 census

As of the 2020 census, Koontz Lake had a population of 1,667. The median age was 44.4 years. 20.9% of residents were under the age of 18 and 20.3% were 65 years of age or older. For every 100 females, there were 103.8 males, and for every 100 females age 18 and over, there were 103.5 males.

0.0% of residents lived in urban areas, while 100.0% lived in rural areas.

There were 713 households in Koontz Lake, of which 23.8% had children under the age of 18 living in them. Of all households, 49.4% were married-couple households, 18.9% were households with a male householder and no spouse or partner present, and 22.3% were households with a female householder and no spouse or partner present. About 27.9% of all households were made up of individuals, and 13.2% had someone living alone who was 65 years of age or older.

Notes

  • Koontz Lake History by the Starke County Public Library
  • Koontz Lake Association
  • Koontz Lake Regional Sewer District
  • Koontz Lake Volunteer Fire Department