Mercer County, NJ Map
Official Census boundary of Mercer County, New Jersey (FIPS 34021). Turn on flood zones, contours, land cover and school districts, measure distances, or click any spot to inspect it.
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Mercer County Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
385,864
Households
144,114
Median household income
$100,645
Median age
39.5 years
Median home value
$377,700
Median gross rent
$1,623/mo
Owner-occupied homes
62.2%
Bachelor's degree or higher
45.4%
Below poverty level
10.3%
Land area
224.5 sq mi
Population density
1,719 / sq mi