St. Marys: Demographics & People
St. Marys is home to 2,174 people, in 902 households. Population shrank 0.2% from 2,178 (2022) to 2,174 (2024). Median age 44.9 years. (0.9y older than Pleasants County; 2.0y older than West Virginia). Children under 18 are 17% of the population. Population is 94% White (non-Hispanic) and 4% Hispanic or Latino. The community is relatively homogeneous (Simpson index 0.06). 59% of households are family-led. County is losing 389 residents per year (2022-2023). County health: 41% adult obesity, 21% smoke.
- 2.4 people per household.
- 41% non-family households (singles, roommates).
Population & Trend
Population shrank 0.2% from 2,178 (2022) to 2,174 (2024). Estimated 2026 population: ~2,170 (extrapolated at -0.1%/yr trend).
| Census data vintage | 2024 |
|---|---|
| Population | 7,653 people |
| Annual growth rate · Population change | -0.2% |
| Annual growth rate · Population (2022) | 2,178 |
| Annual growth rate · Population (2024) | 2,174 |
| Annual growth rate · Trend category | stable |
| Population | 2,174 people |
| Population Estimate | 2,164 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 44.9y is 6.0 years older than the U.S. median (38.9y). Children under 18 make up 17% — below the U.S. share of ~22%.
| Age Summary · Median age | 44.9 years (vs West Virginia 42.9y) |
|---|---|
| Age Summary · Children Pct | 17.2% |
| Age Summary · Character | established |
| Population under 18 | 375 |
| Median age | 44.9 years (vs West Virginia 42.9y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 2,174 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 | 2,078 |
|---|---|
| Hispanic or Latino residents | 69 |
| Diversity Index · Diversity index (Simpson) | 6.2% |
| Diversity Index · Diversity label | relatively homogeneous |
| Diversity Index · Groups counted | 2 |
| Diversity Index · Largest group share | 96.8% |
| Hispanic or Latino population | 4.0% |
| White (non-Hispanic) population | 93.7% |
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 (7)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 1,340 |
|---|---|
| Residents born in another state | 834 |
| Share born in this state | 61.6% |
| Share born in another state | 38.4% |
| Native-born U.S. citizens | 38.4% |
| Total foreign-born residents | 31 |
Households & Family Composition
902 households. Averaging 2.5 people each — matches the U.S. average of 2.5. 59% are family households — below the U.S. share of ~65%. Of 541 families, 15% are married couples with children.
| Children under 18 | 393 |
|---|---|
| Total families | 541 |
| Married couples with children | 82 |
| Single-parent households | 54 |
| Average household size | 2.47 |
| Women who gave birth (past year) | 19.0% |
| Grandparents living with grandchildren | 108 |
| Grandparents responsible for grandchildren | 46 |
| Family households | 531 households |
| Households that are families | 58.9% |
| Total households | 902 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. 9.6% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 389 residents per year on net (IRS migration data).
| Moved within the county (past year) | 9.6% |
|---|---|
| Migration · People moving in (annual) | 6,091 |
| Migration · People moving out (annual) | 6,480 |
| Migration · Net migration (in − out) | -389 |
| 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 | 155 |
|---|---|
| Disability rate | 6.8% |
Other
| Congressional District · District | 1 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 54,073 |
| Cdc Birth Rate · State Fips | 54 |
| Cdc Birth Rate · County Fips | 73 |
| Cdc Birth Rate · County | Pleasants |
| Cdc Birth Rate · Birth Rate | 35.9% |
| Cdc Birth Rate · Lower Ci | 25.50 |
| Cdc Birth Rate · Upper Ci | 48.90 |
| Cdc Mortality · Fips | 54,073 |
| Cdc Mortality · County | Pleasants County |
| Cdc Mortality · Urban Rural | Noncore |
| Cdc Mortality · Total Deaths 2020 2023 | 260 |
| Cdc Vaccination · Fips | 54,073 |
| Cdc Vaccination · County | Pleasants County |
| Cdc Vaccination · Dose1 Pop Pct | 61.6% |
| Cdc Vaccination · Series Complete Pct | 54.4% |
| Cdc Vaccination · Booster Pct | 46.8% |
| Cdc Vaccination · Population 2019 | 7,460 |
| Cdc Vaccination · Metro Status | Non-metro |
| Family Score · Score | 1.80 |
| Family Score · Schools | 1 |
| Family Score · Childcare Centers | 1 |
| Family Score · Children Pct | 17.2% |
| Family Score · Rating | limited |
| Town Summary · Key Facts | population 2,174, stable, established, middle-class, mixed |
| Town Summary · Population | 2,174 people |
| Town Summary · County | Pleasants County |
Sources: NCES school congressional district assignment · federal dataset cascade