St. Clairsville: Demographics & People
Census counts 5,003 people in St. Clairsville, in 2,101 households. Population shrank 0.8% from 5,043 (2022) to 5,003 (2024). Median age 40.4 years. (3.7y younger than Belmont County; 0.6y older than Ohio). Children under 18 are 20% of the population. Population is 84% White (non-Hispanic) and 5% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.14). 57% of households are family-led. County is losing 77 residents per year (2022-2023). County health: 43% adult obesity, 23% smoke.
- 2.4 people per household.
- 43% non-family households (singles, roommates).
Population & Trend
Population shrank 0.8% from 5,043 (2022) to 5,003 (2024). Estimated 2026 population: ~4,963 (extrapolated at -0.4%/yr trend). Census Bureau Vintage estimate: 4,911.
| Census data vintage | 2024 |
|---|---|
| Population | 66,497 people |
| Annual growth rate · Population change | -0.8% |
| Annual growth rate · Population (2022) | 5,043 |
| Annual growth rate · Population (2024) | 5,003 |
| Annual growth rate · Trend category | stable |
| Population | 5,003 people |
| Population Estimate | 4,911 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 40.4y is 1.5 years older than the U.S. median (38.9y). Children under 18 make up 20% — below the U.S. share of ~22%.
| Age Summary · Median age | 40.4 years (vs Ohio 39.8y) |
|---|---|
| Age Summary · Children Pct | 19.8% |
| Age Summary · Character | established |
| Population under 18 | 990 |
| Median age | 40.4 years (vs Ohio 39.8y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 5,003 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.14 (0 = single group, 1 = perfectly even distribution); this is read as relatively homogeneous.
| White residents | 4,390 |
|---|---|
| Black residents | 100 |
| Asian residents | 20 |
| Hispanic or Latino residents | 236 |
| Diversity Index · Diversity index (Simpson) | 14.1% |
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 92.5% |
| Asian population | 0.9% |
| Black population | 2.7% |
| Hispanic or Latino population | 5.1% |
| White (non-Hispanic) population | 83.9% |
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 (8)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 0.3% are foreign-born — below the U.S. average of 13.9%. 2% have naturalized to U.S. citizenship.
| Residents born in this state | 1,996 |
|---|---|
| Residents born in another state | 2,889 |
| Share born in this state | 39.9% |
| Share born in another state | 60.1% |
| Native-born U.S. citizens | 57.7% |
| Foreign-born residents | 0.3% |
| Naturalized citizens | 2.1% |
| Total foreign-born residents | 16 |
| From Africa | 16 |
Households & Family Composition
2,101 households. Averaging 2.4 people each — smaller than the U.S. average of 2.5. 57% are family households — below the U.S. share of ~65%. Of 1,228 families, 22% are married couples with children.
| Children under 18 | 866 |
|---|---|
| Total families | 1,228 |
| Married couples with children | 273 |
| Single-parent households | 68 |
| Average household size | 2.36 |
| Women who gave birth (past year) | 12.6% |
| Grandparents living with grandchildren | 34 |
| Grandparents responsible for grandchildren | 9 |
| Family households | 1,207 households |
| Households that are families | 57.4% |
| Total households | 2,101 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. 12.1% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 77 residents per year on net (IRS migration data).
| Moved within the county (past year) | 12.1% |
|---|---|
| Migration · People moving in (annual) | 55,203 |
| Migration · People moving out (annual) | 55,280 |
| Migration · Net migration (in − out) | -77 |
| 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 | 264 |
|---|---|
| Disability rate | 5.4% |
Group Quarters
Group quarters are non-household living arrangements counted by the Census — college dormitories, nursing homes, military barracks, group homes, correctional facilities, and similar institutional or shared housing. 230 residents live in group quarters (4.6% of population).
| Living in group quarters | 230 |
|---|
Other
| Congressional District · District | 6 |
|---|---|
| Congressional District · Formatted | OH-06 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 39,013 |
| Cdc Birth Rate · State Fips | 39 |
| Cdc Birth Rate · County Fips | 13 |
| Cdc Birth Rate · County | Belmont |
| Cdc Birth Rate · Birth Rate | 22.3% |
| Cdc Birth Rate · Lower Ci | 19.00 |
| Cdc Birth Rate · Upper Ci | 25.90 |
| Cdc Mortality · Fips | 39,013 |
| Cdc Mortality · County | Belmont County |
| Cdc Mortality · Urban Rural | Small metro |
| Cdc Mortality · Total Deaths 2020 2023 | 2,283 |
| Cdc Vaccination · Fips | 39,013 |
| Cdc Vaccination · County | Belmont County |
| Cdc Vaccination · Dose1 Pop Pct | 56.8% |
| Cdc Vaccination · Series Complete Pct | 50.5% |
| Cdc Vaccination · Booster Pct | 47.8% |
| Cdc Vaccination · Population 2019 | 67,006 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 18 |
| Family Score · Childcare Centers | 3 |
| Family Score · Children Pct | 19.8% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 5,003, stable, established, upper-middle, mixed |
| Town Summary · Population | 5,003 people |
| Town Summary · County | Belmont County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade