St. Clair: Demographics & People
About 37 people live in St. Clair, in 12 households. Median age 31.2 years. (11.9y younger than Blair County; 10.0y younger than Pennsylvania). Children under 18 are 35% of the population. Population is 100% White (non-Hispanic). 67% of households are family-led. County is losing 501 residents per year (2022-2023). County health: 36% adult obesity, 20% smoke.
- 3.1 people per household.
- 33% non-family households (singles, roommates).
Population & Trend
Current population 37; figures track the most recent Census ACS 5-year estimates.
| Census data vintage | 2024 |
|---|---|
| Population | 122,822 people |
| Population | 37 people |
| Population Estimate | 37 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 31.2y is 7.7 years younger than the U.S. median (38.9y). Children under 18 make up 35% — above the U.S. share of ~22%.
| Age Summary · Median age | 31.2 years (vs Pennsylvania 41.2y) |
|---|---|
| Age Summary · Children Pct | 35.1% |
| Age Summary · Character | young professional |
| Population under 18 | 13 |
| Median age | 31.2 years (vs Pennsylvania 41.2y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 37 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| White residents | 37 |
|---|---|
| Diversity Index · Interpretation | less diverse |
| 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 (2)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS).
| Residents born in this state | 37 |
|---|---|
| Share born in this state | 100.0% |
| Total foreign-born residents | 1,495 |
Households & Family Composition
12 households. Averaging 3.1 people each — larger than the U.S. average of 2.5. 67% are family households — near the U.S. share of ~65%. Of 10 families, 0% are married couples with children.
| Children under 18 | 12 |
|---|---|
| Total families | 10 |
| Single-parent households | 5 |
| Average household size | 3.08 |
| Women who gave birth (past year) | 21.4% |
| Grandparents living with grandchildren | 3 |
| Family households | 8 households |
| Households that are families | 66.7% |
| Total households | 12 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. 8.1% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 501 residents per year on net (IRS migration data).
| Lived in same home a year ago | 37.0% |
|---|---|
| Moved within the county (past year) | 8.1% |
| Migration · People moving in (annual) | 106,399 |
| Migration · People moving out (annual) | 106,900 |
| Migration · Net migration (in − out) | -501 |
| 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 | 7 |
|---|---|
| Disability rate | 13.2% |
Other
| Congressional District · District | 13 |
|---|---|
| Congressional District · Formatted | PA-13 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 42,013 |
| Cdc Birth Rate · State Fips | 42 |
| Cdc Birth Rate · County Fips | 13 |
| Cdc Birth Rate · County | Blair |
| Cdc Birth Rate · Birth Rate | 18.9% |
| Cdc Birth Rate · Lower Ci | 16.80 |
| Cdc Birth Rate · Upper Ci | 21.30 |
| Cdc Mortality · Fips | 42,013 |
| Cdc Mortality · County | Blair County |
| Cdc Mortality · Urban Rural | Small metro |
| Cdc Mortality · Total Deaths 2020 2023 | 7,548 |
| Cdc Vaccination · Fips | 42,013 |
| Cdc Vaccination · County | Blair County |
| Cdc Vaccination · Dose1 Pop Pct | 65.0% |
| Cdc Vaccination · Series Complete Pct | 55.7% |
| Cdc Vaccination · Booster Pct | 49.2% |
| Cdc Vaccination · Population 2019 | 121,829 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 20 |
| Family Score · Children Pct | 35.1% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 37, young professional, high crime, heritage: American/Scottish |
| Town Summary · Population | 37 people |
| Town Summary · County | Blair County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade