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COUNTY · 1990 CENSUS

Mercer County

New Jersey · 325,824 residents · 224 sq mi
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The short version

With 325,824 people, Mercer County is a county in New Jersey. About 30% of adults have finished a four-year degree. The typical home is worth $136,700. Median household income runs $41,227, well clear of the $30,130 US median. The poverty rate is 7.4%, under the national 13.2%. Median rent is $570 a month.

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
Median age
34.2
−5%vs 2000
vs 36.0 in 2000
US average: 33.0
Land area
224 sq mi
Population, 1990 – 2024
320K338K357K375K393K19902000201020202024Mercer County
2024386K
1990201020202024
Age distribution, 1990
Under 56.7%(21,739)
US avg: 7.3%
5 to 96.2%(20,294)
US avg: 7.3%
10 to 146%(19,456)
US avg: 6.9%
15 to 197.1%(23,101)
US avg: 7.1%
20 to 248.3%(26,920)
US avg: 7.5%
25 to 3417.2%(55,973)
US avg: 17.5%
35 to 4416.2%(52,627)
US avg: 15.1%
45 to 5410.5%(34,135)
US avg: 10.2%
55 to 648.9%(29,020)
US avg: 8.5%
65 to 747.9%(25,600)
US avg: 7.3%
75 to 844%(12,939)
US avg: 4%
85 and over1.2%(4,020)
US avg: 1.2%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
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
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%
1990
White, non-Hispanic75.2%(244,880)
Black18.8%(61,253)
Hispanic / Latino5.7%(18,723)
Asian3%(9,894)
Other3%(9,797)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin
Central American8.1%(31,180)
Guatemalan6%(23,328)
Puerto Rican5%(19,121)
South American4%(15,452)
Dominican2.8%(10,739)
Ecuadorian2.1%(8,136)
Mexican1.3%(5,106)
Honduran0.8%(3,153)
Colombian0.7%(2,564)
Peruvian0.6%(2,388)
Costa Rican0.5%(1,874)
Salvadoran0.4%(1,577)
+ 10 more hispanic origin groups with data
Cuban0.4%(1,364)
Venezuelan0.3%(1,208)
Spaniard0.2%(910)
Panamanian0.2%(717)
Argentine0.1%(341)
Nicaraguan0.1%(329)
Chilean0.1%(311)
Bolivian0%(177)
Uruguayan0%(169)
Asian origin
Asian Indian7.2%(27,691)
Chinese2.4%(9,172)
Filipino0.7%(2,849)
Korean0.7%(2,561)
Pakistani0.3%(1,193)
Japanese0.3%(981)
Taiwanese0.2%(769)
Burmese0.1%(431)
Vietnamese0.1%(405)
Bangladeshi0.1%(234)
Nepalese0%(149)
Thai0%(77)
+ 5 more asian origin groups with data
Pacific Islander origin
Samoan0%(84)
Chamorro0%(37)
Ancestry
Italian10.2%(39,398)
Irish9.8%(37,770)
German8.3%(32,190)
English5.7%(21,928)
Polish4.9%(18,883)
American2.4%(9,301)
West Indian2.2%(8,610)
Russian1.3%(4,836)
Hungarian1.1%(4,331)
Haitian1%(3,918)
French1%(3,847)
+ 49 more ancestry groups with data
Scottish1%(3,836)
Jamaican0.8%(3,137)
Arab0.7%(2,815)
Dutch0.7%(2,801)
Ukrainian0.5%(2,119)
Slovak0.5%(1,863)
Swedish0.4%(1,675)
Greek0.4%(1,597)
Nigerian0.4%(1,502)
Lithuanian0.4%(1,398)
Norwegian0.3%(1,338)
British0.3%(1,266)
Egyptian0.3%(1,189)
Scotch-Irish0.3%(1,134)
Turkish0.3%(1,074)
Romanian0.3%(1,066)
Czech0.3%(1,052)
Austrian0.3%(1,041)
Welsh0.3%(1,029)
Danish0.3%(1,007)
Ghanaian0.2%(840)
Portuguese0.2%(787)
Canadian0.2%(726)
Brazilian0.2%(682)
Swiss0.1%(485)
Moroccan0.1%(415)
Lebanese0.1%(388)
Iranian0.1%(388)
Croatian0.1%(360)
Guyanese0.1%(345)
Israeli0.1%(339)
Palestinian0.1%(295)
Bulgarian0.1%(286)
Armenian0.1%(259)
Slovene0.1%(241)
Kenyan0.1%(206)
Ethiopian0.1%(198)
Finnish0%(162)
Belgian0%(148)
Latvian0%(138)
Barbadian0%(101)
Syrian0%(95)
Serbian0%(94)
Jordanian0%(54)
Somali0%(8)
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.

Marital status (2024)
Men 15+
Never married39.5%(61,176)
Married51.1%(79,199)
Widowed2.1%(3,186)
Divorced7.3%(11,276)
Women 15+
Never married36%(58,078)
Married46.1%(74,291)
Widowed8.1%(13,143)
Divorced9.8%(15,773)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured
7.9%
−3.7 ptssince 2013
from 11.6% in 2013
US average: 8.4%
Employer-based
63.0%
−3.5 ptssince 2020
from 66.5% in 2020
US average: 54.8%
Direct-purchase
11.3%
+1.3 ptssince 2020
from 10.0% in 2020
US average: 13.8%
Medicare
16.4%
Unchangedsince 2020
from 16.4% in 2020
US average: 18.4%
Medicaid
18.1%
+0.8 ptssince 2020
from 17.3% in 2020
US average: 20.9%
VA health care
0.7%
−0.2 ptssince 2020
from 0.9% in 2020
US average: 2.2%
Any private
71.8%
−2.3 ptssince 2020
from 74.1% in 2020
US average: 67.1%
Any public
31.8%
+0.6 ptssince 2020
from 31.2% in 2020
US average: 36.7%

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)22.2%(2,263)
US avg: 26.4%
Gulf War (1990s)20.2%(2,060)
US avg: 24.3%
Vietnam era33.2%(3,379)
US avg: 33.1%
Korean War6.4%(650)
US avg: 4.5%
World War II1.6%(164)
US avg: 1%

Share of the 10,176 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
Drill deeper

Places similar to Mercer County

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Pop 381,605
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Pop 417,669
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Pop 378,426
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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 →