Koontz LakeDemographics & People
Koontz Lake is home to 1,182 people, in 654 households. Population shrank 2.9% from 1,217 (2022) to 1,182 (2024). Median age 55.0 years. (12.9y older than Starke County; 17.0y older than Indiana). Children under 18 are 15% of the population. Population is 97% White (non-Hispanic) and 3% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.02). 57% of households are family-led. County is losing 208 residents per year (2022-2023). County health: 36% adult obesity, 19% smoke.
- 1.8 people per household (vs Indiana avg 2.5).
- 43% non-family households (singles, roommates) (vs Indiana 42%).
- 58 dependents per 100 working-age (youth + seniors / 18-64) (vs Indiana 67).
Population & Trend
Population shrank 2.9% from 1,217 (2022) to 1,182 (2024). Estimated 2026 population: ~1,148 (extrapolated at -1.4%/yr trend). Census Bureau Vintage estimate: 1,104.
| Census data vintage | 2024 |
|---|---|
| County Population | 46,095 people |
| Annual growth rate · Population change | -2.9% |
| Annual growth rate · Population (2022) | 1,217 |
| Annual growth rate · Population (2024) | 1,182 |
| Annual growth rate · Trend category | declining |
| Population | 1,182 people (vs Indiana 51,043) |
| Population Estimate | 1,104 |
Sources: U.S. Census Bureau, ACS 5-Year · U.S. Census Bureau, ACS 5-Year DP05 · U.S. Census Bureau, Vintage Population Estimates · Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 55.0y is 16.1 years older than the U.S. median (38.9y). Children under 18 make up 15% — below the U.S. share of ~22%.
| Age Summary · Median age | 55.0 years (vs Indiana 36.0y) |
|---|---|
| Age Summary · Children Pct | 14.6% |
| Age Summary · Character | retirement community |
| Age Summary · Total Pop | 1,182 |
| Age Summary · Under 18 | 173 |
| Age Summary · 18 To 34 | 46.0× |
| Age Summary · 35 To 64 | 700 |
| Age Summary · 65 Plus | 263 |
| Median age | 55.0 years (vs Indiana 36.0y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 1,182 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.02 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| Diversity Index · Diversity index (Simpson) | 1.9% |
|---|---|
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 2 |
| Diversity Index · Largest group share | 99.0% |
| Hispanic or Latino population | 3.1% (vs Indiana 8.9%) |
| White (non-Hispanic) population | 96.9% (vs Indiana 74.1%) |
Sources: U.S. Census Bureau, ACS 5-Year DP05 · Census ACS 5-Year 2023 · Refreshed 2026-04-12
Ancestry
Self-reported ancestry from Census ACS — what residents report as their ethnic origin, separate from race. Counts can exceed population because people can list multiple ancestries.
Top (8)
Sources: Census ACS 2022 B04006+B03001+B02001
Households & Family Composition
654 households. Averaging 1.9 people each — smaller than the U.S. average of 2.5. 57% are family households — below the U.S. share of ~65%. Of 374 families, 29% are married couples with children.
| Family households | 374 households (vs Indiana 11,890) |
|---|---|
| Households that are families | 57.2% (at Indiana median) |
| Total households | 654 households (vs Indiana 21,552) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 7.6% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 208 residents per year on net (IRS migration data).
| Migration · People moving in (annual) | 45,583 |
|---|---|
| Migration · People moving out (annual) | 45,791 |
| Migration · Net migration (in − out) | -208 |
Sources: IRS SOI Migration 2021-2022 · Refreshed 2026-04-12
Other
| County Cdc Birth Rate · Fips | 18099 |
|---|---|
| County Cdc Birth Rate · State Fips | 18 |
| County Cdc Birth Rate · County Fips | 099 |
| County Cdc Birth Rate · County | Marshall |
| County Cdc Birth Rate · Birth Rate | 18.5 per 1,000 |
| County Cdc Birth Rate · Lower Ci | 15.50 |
| County Cdc Birth Rate · Upper Ci | 21.80 |
| County Cdc Mortality · Fips | 18099 |
| County Cdc Mortality · County | Marshall County |
| County Cdc Mortality · Urban Rural | Micropolitan |
| County Cdc Mortality · Total Deaths 2020 2023 | 1,588 |
Sources: CDC NCHS Vital Statistics · CDC WONDER