With 43,864 people, Jefferson County is a county in Pennsylvania. Four-year degrees are less common here than nationally, at 18% of adults. The median age is 44.0, about 5 years above the US median. The typical home is worth $139,700, having more than doubled since 2000. The foreign-born share is 0%. 75% of homes are owner-occupied.
At a glance
Lower income
median household income $58,686, below the US median
US median: $82,259
Older
median age 44.0
US median: 38.9
Less educated
18% hold a bachelor's degree
US average: 36%
Less affordable
home values up 29%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Jefferson County
What changed most since 1990
White share99.6% → 95.5%(−4.1 pts)US over the same years: −17.8 pts
Median home value (2024 dollars)$102,003 → $139,700(+37%)US over the same years: +67%
Adults with a bachelor's degree8.9% → 18.4%(+9.4 pts)US over the same years: +15.3 pts
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)17.4%(476)
US avg: 26.4%
Gulf War (1990s)22.1%(606)
US avg: 24.3%
Vietnam era33.3%(912)
US avg: 33.1%
Korean War6.7%(184)
US avg: 4.5%
World War II0.9%(25)
US avg: 1%
Share of the 2,740 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Jefferson County, decade by decade
Jefferson County population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
46,083
$52,953
$102,003
8.9%
1.1
2000
45,932
$57,787
$108,571
11.7%
3.3
2010
45,200
$55,250
$115,230
12.0%
5.1
2020
44,492
$60,122
$131,870
16.2%
11.9
2024
43,864
$58,686
$139,700
18.4%
11.0
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
How many people live in Jefferson County, Pennsylvania?
Jefferson County, Pennsylvania has about 43,864 residents according to the 2024 American Community Survey.
What is the median household income in Jefferson County, Pennsylvania?
The typical household in Jefferson County, Pennsylvania earns about $58,686 a year. Half of households make more than that, and half make less.
Is Jefferson County, Pennsylvania expensive?
In Jefferson County, Pennsylvania, the median home is worth about $139,700, and the typical rent is about $750 a month.
How educated are people in Jefferson County, Pennsylvania?
About 18.4% of adults age 25 and over in Jefferson County, Pennsylvania hold a bachelor's degree or higher.
What is the poverty rate in Jefferson County, Pennsylvania?
About 14.1% of people in Jefferson County, Pennsylvania live below the federal poverty line.
Has Jefferson County, Pennsylvania grown since 1990?
Yes, Jefferson County, Pennsylvania has shrunk since 1990. The population has lost about 2,219 residents, a change of about -5 percent over that period.
