St. Johns: Demographics & People
St. Johns is home to 163 people, in 73 households. Population shrank 48.2% from 315 (2022) to 163 (2024). Median age 44.0 years. (3.0y older than Auglaize County; 4.2y older than Ohio). Population is 100% White (non-Hispanic). The community is relatively homogeneous (Simpson index 0.06). 70% of households are family-led. County is gaining 190 residents per year (2022-2023). County health: 43% adult obesity, 18% smoke.
- 2.2 people per household.
- 30% non-family households (singles, roommates).
Population & Trend
Population shrank 48.2% from 315 (2022) to 163 (2024). Estimated 2026 population: ~93 (extrapolated at -24.1%/yr trend). Census Bureau Vintage estimate: 35.
| Census data vintage | 2024 |
|---|---|
| Population | 46,422 people |
| Annual growth rate · Population change | -48.2% |
| Annual growth rate · Population (2022) | 315 |
| Annual growth rate · Population (2024) | 163 |
| Annual growth rate · Trend category | shrinking |
| Population | 163 people |
| Population Estimate | 35 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 44.0y is 5.1 years older than the U.S. median (38.9y).
| Age Summary · Median age | 44.0 years (vs Ohio 39.8y) |
|---|---|
| Age Summary · Character | established |
| Median age | 44.0 years (vs Ohio 39.8y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 163 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.06 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| White residents | 297 |
|---|---|
| Black residents | 10 |
| Diversity Index · Diversity index (Simpson) | 6.3% |
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 2 |
| Diversity Index · Largest group share | 96.7% |
| White (non-Hispanic) population | 100.0% |
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 (5)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 142 |
|---|---|
| Residents born in another state | 21 |
| Share born in this state | 87.1% |
| Share born in another state | 12.9% |
| Native-born U.S. citizens | 12.9% |
| Total foreign-born residents | 282 |
Households & Family Composition
73 households. Averaging 3.0 people each — larger than the U.S. average of 2.5. 70% are family households — above the U.S. share of ~65%. Of 84 families, 23% are married couples with children.
| Children under 18 | 56 |
|---|---|
| Total families | 84 |
| Married couples with children | 19 |
| Average household size | 3.03 |
| Grandparents living with grandchildren | 499 |
| Grandparents responsible for grandchildren | 200 |
| Family households | 51 households |
| Households that are families | 69.9% |
| Total households | 73 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. 26.4% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is gaining 190 residents per year on net (IRS migration data).
| Moved within the county (past year) | 26.4% |
|---|---|
| Migration · People moving in (annual) | 45,587 |
| Migration · People moving out (annual) | 45,397 |
| Migration · Net migration (in − out) | 190 |
| 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 | 13 |
|---|---|
| Disability rate | 4.6% |
Other
| Congressional District · District | 4 |
|---|---|
| Congressional District · Formatted | OH-04 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 39,011 |
| Cdc Birth Rate · State Fips | 39 |
| Cdc Birth Rate · County Fips | 11 |
| Cdc Birth Rate · County | Auglaize |
| Cdc Birth Rate · Birth Rate | 19.1% |
| Cdc Birth Rate · Lower Ci | 15.90 |
| Cdc Birth Rate · Upper Ci | 22.70 |
| Cdc Mortality · Fips | 39,011 |
| Cdc Mortality · County | Auglaize County |
| Cdc Mortality · Urban Rural | Micropolitan |
| Cdc Mortality · Total Deaths 2020 2023 | 1,576 |
| Cdc Vaccination · Fips | 39,011 |
| Cdc Vaccination · County | Auglaize County |
| Cdc Vaccination · Dose1 Pop Pct | 42.0% |
| Cdc Vaccination · Series Complete Pct | 40.2% |
| Cdc Vaccination · Booster Pct | 53.3% |
| Cdc Vaccination · Population 2019 | 45,656 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 8.00 |
| Family Score · Schools | 14 |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 163, shrinking, established, middle-class, mixed |
| Town Summary · Population | 163 people |
| Town Summary · County | Auglaize County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade