St. Clair, Pennsylvania Demographics & Population 2026
During the 2020–2024 ACS period, St. Clair, Pennsylvania had a total population of 37, the 1964th largest community in Pennsylvania. The poverty rate is 56.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- More than 1 in 4 residents live below the poverty line (56.8%), well above the national average of 12.4%.
- Only 4.3% of adults have a bachelor's degree, well below the national average of 35.7%.
St. Clair Quick Facts
How St. Clair Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 37 | 37 | +0.0% |
How St. Clair Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 45 | National average: 61
Education
Educational Attainment (Adults 25+)
St. Clair Rankings in Pennsylvania
Explore Pennsylvania Rankings
Other Cities in Blair County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Altoona | 43,196 | $51,250 | 16.6% | $119,900 |
| Hollidaysburg | 5,558 | $69,458 | 8.2% | $196,100 |
| Tyrone | 5,377 | $57,226 | 11.5% | $139,800 |
| Greenwood | 2,853 | $73,250 | 4.9% | $140,300 |
| Penn Farms | 2,508 | $89,867 | 3.9% | $348,900 |
| Roaring Spring | 2,335 | $62,738 | 13.4% | $142,200 |
| Loop | 2,039 | $91,818 | 4.7% | $245,300 |
| Martinsburg | 1,741 | $71,307 | 8.5% | $157,200 |
| Bellwood | 1,691 | $52,305 | 16.3% | $145,700 |
| Lakemont | 1,644 | $52,955 | 13.1% | $157,100 |
Cities Similar to St. Clair
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Elk Grove | 37 | $41,250 | $212,500 | 5.9% | 13.5% |
| Reese | 37 | N/A | N/A | 0.0% | 0.0% |
| Wopsononock | 38 | N/A | N/A | 0.0% | 0.0% |
| Jonestown | 36 | N/A | $241,700 | 25.0% | 16.7% |
| Culp | 39 | N/A | $214,600 | 34.5% | 0.0% |
A note before these figures: with a population of 37, St. Clair's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
St. Clair is a small community located in Pennsylvania, within Blair County. The total population is 37. It ranks as the 1964th most populous out of 1,991 Census-designated places in Pennsylvania.
Age Demographics
The median age in St. Clair is 31.2 years. This is 24% lower than the state median of 40.9 years. With 35.1% of the population under 18, St. Clair has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The poverty rate stands at 56.8%. This is 385% higher than the state poverty rate of 11.7%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The survey records no unemployed residents in St. Clair, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $166,700. Housing costs are 34% lower than the state median of $254,500. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 44% higher than the state average of 69.3%.
Race & Ethnicity
Every resident counted in St. Clair was recorded as White (non-Hispanic). A figure of exactly 100.0% reflects a survey sample too small to capture the community's full composition rather than a precise measurement.
Education
4.3% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 88% lower than the state rate of 35.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 78.3%.
Data Sources & Methodology
All demographic data for St. Clair, Pennsylvania is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Pennsylvania state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,991 Census-designated places in Pennsylvania. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of St. Clair, Pennsylvania?
St. Clair, Pennsylvania has a population of 37 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in St. Clair, PA?
The Census Bureau does not publish a reliable median household income estimate for St. Clair — the community is too small for the ACS sample. The national median is $80,734.
What is the poverty rate in St. Clair, PA?
The poverty rate in St. Clair is 56.8%. This means approximately 21 residents live below the federal poverty line.
What is the racial makeup of St. Clair, Pennsylvania?
St. Clair's population is 100.0% White, 0.0% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in St. Clair, PA?
The median home value in St. Clair is $166,700.
How educated is St. Clair, Pennsylvania?
4.3% of adults (25+) in St. Clair hold a bachelor's degree or higher, and 4.3% hold a graduate or professional degree.