Geography
Koontz Lake is located in the northeast corner of Starke County. [6] 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 4 miles (6 km) 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 4.0 square miles (10 km2), of which 3.5 square miles (9.1 km2) are land and 0.5 square miles (1.3 km2), or 12.90%, are water. [1] The outlet of the lake is at its west end, into Robbins Ditch, which flows west to the Kankakee River, a tributary of the Illinois River.
Demographics
Historical population| Census | Pop. | Note | %± |
|---|
| 1980 | 1,436 | | — |
|---|
| 1990 | 1,615 | | 12.5% |
|---|
| 2000 | 1,554 | | −3.8% |
|---|
| 2010 | 1,559 | | 0.3% |
|---|
| 2020 | 1,667 | | 6.9% |
|---|
|
As of the census [4] of 2000, there were 1,554 people, 652 households, and 449 families residing in the CDP. The population density was 459.1 inhabitants per square mile (177.3/km2). There were 931 housing units at an average density of 275.0 per square mile (106.2/km2). The racial makeup of the CDP was 97.75% White, 0.13% African American, 0.58% Native American, 0.58% from other races, and 0.97% from two or more races. Hispanic or Latino of any race were 1.74% of the population.
There were 652 households, out of which 26.7% had children under the age of 18 living with them, 56.6% were married couples living together, 8.4% had a female householder with no husband present, and 31.0% were non-families. 26.5% of all households were made up of individuals, and 13.3% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.85.
In the CDP, the population was spread out, with 21.6% under the age of 18, 7.7% from 18 to 24, 25.7% from 25 to 44, 27.0% from 45 to 64, and 18.0% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 93.8 males. For every 100 females age 18 and over, there were 94.1 males.
The median income for a household in the CDP was $37,137, and the median income for a family was $45,114. Males had a median income of $35,388 versus $21,563 for females. The per capita income for the CDP was $21,429. About 6.7% of families and 7.7% of the population were below the poverty line, including 11.5% of those under age 18 and 5.7% of those age 65 or over.
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