Blue Knob vs St. Clair

A side-by-side comparison of Blue Knob and St. Clair: population, income, housing, and more.

Blue Knob and St. Clair are places in Pennsylvania. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

St. Clair has the higher population (37 vs 30 in Blue Knob). Since 2019, Blue Knob's population has grown faster (-38.8% vs -45.6%).

Population, income & housing

	Blue Knob	St. Clair
Population	30	37
Median age	66.7 yrs	31.6 yrs
Median household income	$65,556	—
Housing units	16	12
Homeownership rate	100.0%	100.0%
Bachelor's degree or higher	0.0%	8.7%
Unemployment rate	0.0%	0.0%

Trends (ACS 5-year, 2019–2023)

	Blue Knob	St. Clair
Population	49 → 30 (-38.8%)	68 → 37 (-45.6%)
Median household income	$48,125 → $65,556 (+36.2%)	$31,250 → $23,958 (-23.3%)
Median home value	$113,800 → $181,300 (+59.3%)	$89,200 → $129,200 (+44.8%)

Blue Knob

Population

4930

Median household income

$48,125$65,556

Median home value

$113,800$181,300

St. Clair

Population

6837

Median household income

$31,250$23,958

Median home value

$89,200$129,200

Age & race/ethnicity

Age distribution (share)

	Blue Knob	St. Clair
Under 5	0.0%	0.0%
5 to 17	0.0%	32.4%
18 to 24	0.0%	5.4%
25 to 34	10.0%	37.8%
35 to 44	0.0%	5.4%
45 to 54	0.0%	0.0%
55 to 64	13.3%	13.5%
65 to 74	76.7%	0.0%
75 and over	0.0%	5.4%

Race & ethnicity (share)

	Blue Knob	St. Clair
White (non-Hispanic)	36.7%	100.0%
Black or African American	0.0%	0.0%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.0%	0.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	63.3%	0.0%
Hispanic or Latino	0.0%	0.0%

Educational attainment (age 25+)

Share of adults 25+

	Blue Knob	St. Clair
No high school diploma	0.0%	21.7%
High school graduate	46.7%	60.9%
Some college or associate's	53.3%	8.7%
Bachelor's degree	0.0%	0.0%
Graduate or professional degree	0.0%	8.7%

Commute to work

How workers get to work (share)

	Blue Knob	St. Clair
Drove alone	100.0%	100.0%
Carpooled	0.0%	0.0%
Public transit	0.0%	0.0%
Walked	0.0%	0.0%
Bicycle	0.0%	0.0%
Worked from home	0.0%	0.0%
Other means	0.0%	0.0%

Housing

Units in structure (share)

	Blue Knob	St. Clair
1-unit, detached	100.0%	83.3%
1-unit, attached	0.0%	16.7%
2 to 4 units	0.0%	0.0%
5 to 19 units	0.0%	0.0%
20 or more units	0.0%	0.0%
Mobile home & other	0.0%	0.0%

Poverty & households

	Blue Knob	St. Clair
Poverty rate	13.3%	56.8%
Average household size	1.88	3.08
Median year structure built	1975	1945