COUNTY · 1990 CENSUS

Mercer County

New Jersey · 325,824 residents · 224.478 sq mi

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The short version

Mercer County is significantly wealthier than the US average, with a median household income of $41,227. Population has declined 7% since 2000. 30% of adults hold a bachelor's degree or higher, well above the national rate of 20%. Median home value is $136,700.

At a glance

Wealthier

above the US median

US median: $30,130

Mid-age

median age 34.2

US median: 33.0

More educated

30% hold a bachelor's degree

US average: 20%

Less affordable

home values up 25%, inflation adjusted

US median home: $93,722

Section 01

Population & growth

Total population

325,824

−7%vs 2000

vs 350,761 in 2000

1990 – 2025

Population density

1,451 / sq mi

−7%vs 2000

vs 1,563 / sq mi in 2000

US average: 221

Median age

34.2

−5%vs 2000

vs 36.0 in 2000

US average: 33.0

Population, 1990 – 2024

2024386K

Section 02

Income & economy

Median household income

$41,227

−4%inflation adjusted, since 2000

vs $56,613 in 2000

US average: $30,130

1990 – 2024

Per capita income

$18,936

−32%vs 2000

vs $27,914 in 2000

US average: $14,340

Poverty rate

7.4%

−1.2 ptsvs 2000

vs 8.6% in 2000

US average: 13.2%

Section 03

Housing

Median home value

$136,700

+25%inflation adjusted, since 2000

vs $143,600 in 2000

US average: $93,722

1990 – 2024

Median gross rent

$570

+3%inflation adjusted, since 2000

vs $727 in 2000

US average: $450

Owner-occupied

66.5%

−0.5 ptsvs 2000

vs 67.0% in 2000

33.5% rent

Afford Score

3.3

+31%vs 2000

vs 2.5 in 2000

1990 – 2024

RELATED:See current rent listings in Mercer County on RentDataNow

Section 04

Race & ethnicity

2000

White, non-Hispanic64.2%(225,284)

Black19.4%(67,922)

Hispanic / Latino9.7%(33,898)

Asian4.9%(17,250)

Other0%

Diversity Score65.1%(228,384)

1990

White, non-Hispanic75.2%(244,880)

Black18.8%(61,253)

Hispanic / Latino5.7%(18,723)

Asian3%(9,894)

Other3%(9,797)

Diversity Score57.3%(186,808)

Diversity Score

−12%vs 2000

vs 65 in 2000

1990 – 2024

Section 05

Education

Bachelor's degree or higher

29.5%

−4.5 ptsvs 2000

vs 34.0% in 2000

US average: 20.3%

High school or higher

77.1%

−4.7 ptsvs 2000

vs 81.8% in 2000

US average: 75.2%

Graduate degree

12.6%

−2.9 ptsvs 2000

vs 15.5% in 2000

US average: 7.1%

Section 06

Commute & transportation

Average commute

21.0 min

+12%vs 2000

vs 18.7 min in 2000

US average: 21.9

Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Drill deeper

Places similar to Mercer County

Head to head

Compare Mercer County to nearby counties

MERCER COUNTY VS

Middlesex County

Income$111,549+171%

Home value$462,900+239%

Population883,335+121%

SEE FULL COMPARISON →

MERCER COUNTY VS

Somerset County

Income$140,374+240%

Home value$552,100+304%

Population356,486−11%

SEE FULL COMPARISON →

MERCER COUNTY VS

Bucks County

Income$114,764+178%

Home value$445,700+226%

Population647,828+62%

SEE FULL COMPARISON →

MERCER COUNTY VS

Hunterdon County

Income$141,715+244%

Home value$517,200+278%

Population131,781−67%

SEE FULL COMPARISON →

Frequently asked

How many people live in Mercer County, New Jersey?

Mercer County, New Jersey has about 325,824 residents according to the 1990 Census.

What is the median household income in Mercer County, New Jersey?

The typical household in Mercer County, New Jersey earns about $41,227 a year. Half of households make more than that, and half make less.

Is Mercer County, New Jersey expensive?

In Mercer County, New Jersey, the median home is worth about $136,700, and the typical rent is about $570 a month.

How educated are people in Mercer County, New Jersey?

About 29.5% of adults age 25 and over in Mercer County, New Jersey hold a bachelor's degree or higher.

What is the poverty rate in Mercer County, New Jersey?

About 7.4% of people in Mercer County, New Jersey live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →