St. Leon: Demographics & People
737 people call St. Leon home, in 246 households. Population shrank 27.2% from 1,012 (2022) to 737 (2024). Median age 33.5 years. (8.6y younger than Dearborn County; 4.7y younger than Indiana). Children under 18 are 31% of the population. Population is 95% White (non-Hispanic) and 1% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.00). 75% of households are family-led. County is gaining 499 residents per year (2022-2023). County health: 35% adult obesity, 15% smoke.
- 3.0 people per household.
- 25% non-family households (singles, roommates).
Population & Trend
Population shrank 27.2% from 1,012 (2022) to 737 (2024). Estimated 2026 population: ~550 (extrapolated at -13.6%/yr trend). Census Bureau Vintage estimate: 351.
| Census data vintage | 2024 |
|---|---|
| Population | 50,679 people |
| Annual growth rate · Population change | -27.2% |
| Annual growth rate · Population (2022) | 1,012 |
| Annual growth rate · Population (2024) | 737 |
| Annual growth rate · Trend category | shrinking |
| Population | 737 people |
| Population Estimate | 351 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 33.5y is 5.4 years younger than the U.S. median (38.9y). Children under 18 make up 31% — above the U.S. share of ~22%.
| Age Summary · Median age | 33.5 years (vs Indiana 38.2y) |
|---|---|
| Age Summary · Children Pct | 31.2% |
| Age Summary · Character | young professional |
| Population under 18 | 230 |
| Median age | 33.5 years (vs Indiana 38.2y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 737 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.00 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| White residents | 933 |
|---|---|
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 1 |
| Diversity Index · Largest group share | 100.0% |
| Hispanic or Latino population | 1.2% |
| White (non-Hispanic) population | 95.3% |
Sources: 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 (6)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 241 |
|---|---|
| Residents born in another state | 489 |
| Share born in this state | 32.7% |
| Share born in another state | 67.3% |
| Native-born U.S. citizens | 66.4% |
| Naturalized citizens | 0.9% |
| Total foreign-born residents | 9 |
Households & Family Composition
246 households. Averaging 3.2 people each — larger than the U.S. average of 2.5. 75% are family households — above the U.S. share of ~65%. Of 251 families, 45% are married couples with children.
| Children under 18 | 328 |
|---|---|
| Total families | 251 |
| Married couples with children | 114 |
| Single-parent households | 8 |
| Average household size | 3.21 |
| Women who gave birth (past year) | 10.4% |
| Grandparents living with grandchildren | 4 |
| Family households | 184 households |
| Households that are families | 74.8% |
| Total households | 246 households |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 4.2% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 499 residents per year on net (IRS migration data).
| Moved within the county (past year) | 4.2% |
|---|---|
| Migration · People moving in (annual) | 50,541 |
| Migration · People moving out (annual) | 50,042 |
| Migration · Net migration (in − out) | 499 |
| Migration · Population growing | Yes |
| Migration · Year | 2022-2023 |
Sources: IRS SOI Migration 2021-2022 · Refreshed 2026-04-12
Disability
Census ACS measures self-reported functional limitations — vision, hearing, mobility, cognitive, self-care, or independent-living. The U.S. baseline disability rate is about 12–13%; rates trend higher with median age.
| Residents with a disability | 48 |
|---|---|
| Disability rate | 4.4% |
Other
| Congressional District · District | 9 |
|---|---|
| Congressional District · Formatted | IN-09 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 18,029 |
| Cdc Birth Rate · State Fips | 18 |
| Cdc Birth Rate · County Fips | 29 |
| Cdc Birth Rate · County | Dearborn |
| Cdc Birth Rate · Birth Rate | 16.1% |
| Cdc Birth Rate · Lower Ci | 13.40 |
| Cdc Birth Rate · Upper Ci | 19.20 |
| Cdc Mortality · Fips | 18,029 |
| Cdc Mortality · County | Dearborn County |
| Cdc Mortality · Urban Rural | Large fringe metro |
| Cdc Mortality · Total Deaths 2020 2023 | 1,568 |
| Cdc Vaccination · Fips | 18,029 |
| Cdc Vaccination · County | Dearborn County |
| Cdc Vaccination · Dose1 Pop Pct | 74.3% |
| Cdc Vaccination · Series Complete Pct | 65.6% |
| Cdc Vaccination · Booster Pct | 45.9% |
| Cdc Vaccination · Population 2019 | 49,458 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 6.50 |
| Family Score · Schools | 11 |
| Family Score · Children Pct | 31.2% |
| Family Score · Rating | good |
| Town Summary · Key Facts | population 737, shrinking, young professional, upper-middle, white collar |
| Town Summary · Population | 737 people |
| Town Summary · County | Dearborn County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade