US Census Data

Mercer County vs Northumberland County

A side-by-side comparison of Mercer County and Northumberland County: population, income, housing, and more.

Mercer County and Northumberland County are counties in Pennsylvania. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Mercer County has the higher population (109,852 vs 90,925 in Northumberland County). Mercer County has the higher median household income ($60,614 vs $57,948 in Northumberland County). Mercer County has the higher median home value ($153,600 vs $151,600 in Northumberland County).

Population, income & housing

Mercer CountyNorthumberland County
Population109,85290,925
Median age45.2 yrs44.4 yrs
Median household income$60,614$57,948
Median home value$153,600$151,600
Median gross rent$808$777
Housing units50,88443,395
Homeownership rate72.5%74.8%
Bachelor's degree or higher25.1%19.2%
Unemployment rate5.3%3.9%

Trends (ACS 5-year, 2019–2023)

Mercer CountyNorthumberland County
Population111,518 → 109,852 (-1.5%)91,761 → 90,925 (-0.9%)
Median household income$50,696 → $60,614 (+19.6%)$48,671 → $57,948 (+19.1%)
Median home value$121,100 → $153,600 (+26.8%)$117,400 → $151,600 (+29.1%)
Median gross rent$689 → $808 (+17.3%)$663 → $777 (+17.2%)

Mercer County

Population
111,518109,852
Median household income
$50,696$60,614
Median home value
$121,100$153,600
Median gross rent
$689$808

Northumberland County

Population
91,76190,925
Median household income
$48,671$57,948
Median home value
$117,400$151,600
Median gross rent
$663$777

Age & race/ethnicity

Age distribution (share)

Mercer CountyNorthumberland County
Under 54.8%5.1%
5 to 1714.3%14.7%
18 to 249.3%6.9%
25 to 3410.6%12.0%
35 to 4410.8%12.0%
45 to 5412.4%12.6%
55 to 6415.1%14.9%
65 to 7412.9%12.6%
75 and over9.8%9.1%

Race & ethnicity (share)

Mercer CountyNorthumberland County
White (non-Hispanic)88.6%89.5%
Black or African American5.5%2.4%
American Indian & Alaska Native0.1%0.0%
Asian0.6%0.4%
Native Hawaiian & Pacific Islander0.0%0.0%
Some other race0.3%0.5%
Two or more races3.3%2.3%
Hispanic or Latino1.6%4.9%

Educational attainment (age 25+)

Share of adults 25+

Mercer CountyNorthumberland County
No high school diploma8.7%10.0%
High school graduate40.5%47.7%
Some college or associate's25.8%23.2%
Bachelor's degree16.2%13.5%
Graduate or professional degree8.9%5.7%

Commute to work

How workers get to work (share)

Mercer CountyNorthumberland County
Drove alone80.8%77.7%
Carpooled6.9%9.7%
Public transit0.2%0.3%
Walked2.8%3.2%
Bicycle0.1%0.0%
Worked from home7.8%8.1%
Other means1.4%1.0%

Housing

Units in structure (share)

Mercer CountyNorthumberland County
1-unit, detached74.5%62.0%
1-unit, attached2.7%19.1%
2 to 4 units6.8%8.0%
5 to 19 units4.5%2.5%
20 or more units4.0%4.1%
Mobile home & other7.5%4.4%

Poverty & households

Mercer CountyNorthumberland County
Poverty rate12.8%12.2%
Average household size2.242.32
Mean commute (minutes)2225
Median year structure built19631955

Full profiles

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