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COUNTY · 2020 ACS

Mercer County

New Jersey · 387,340 residents · 224 sq mi
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The short version

Mercer County is home to 387,340 people in New Jersey. About 44% of adults have finished a four-year degree. The foreign-born share is 23%. Median household income runs $83,306, well clear of the $66,278 US median. The population has held roughly steady since 2000. The typical home is worth $290,100, having more than doubled since 2000.

At a glance
Wealthier
above the US median
US median: $66,278
Mid-age
median age 38.5
US median: 38.8
More educated
44% hold a bachelor's degree
US average: 33%
Less affordable
home values up 34%, inflation adjusted
US median home: $265,253
Section 01

Population & growth

Total population
387,340
+10%since 2000
from 350,761 in 2000
1990 – 2025
Median age
38.5
+7%since 2000
from 36.0 in 2000
US average: 38.8
Land area
224 sq mi
Population, 1990 – 2024
320K338K357K375K393K19902000201020202024Mercer County
2024386K
1990201020202024
Age distribution, 2020
Under 55.1%(19,877)
US avg: 5.6%
5 to 95.8%(22,533)
US avg: 6.1%
10 to 146.4%(24,796)
US avg: 6.5%
15 to 197.2%(28,049)
US avg: 6.6%
20 to 247.7%(29,794)
US avg: 6.7%
25 to 3413.1%(50,844)
US avg: 13.5%
35 to 4413%(50,163)
US avg: 12.7%
45 to 5413.2%(51,264)
US avg: 12.3%
55 to 6413%(50,491)
US avg: 13.1%
65 to 748.9%(34,556)
US avg: 10%
75 to 844.5%(17,334)
US avg: 4.9%
85 and over2%(7,639)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$83,306
−2%inflation adjusted, since 2000
from $56,613 in 2000
US average: $66,278
1990 – 2024
Per capita income
$44,532
+60%since 2000
from $27,914 in 2000
US average: $35,364
Households earning $100K+
54.8%
+6.6 ptssince 2009
from 48.2% in 2009
US average: 43.9%
Poverty rate
11.1%
+2.5 ptssince 2000
from 8.6% in 2000
US average: 12.8%
Workforce by industry, 2020
Information9.1%
US avg: 11.1%
Other services8.5%
US avg: 6.6%
Retail trade7.5%
US avg: 10%
Public administration7%
US avg: 4.7%
Finance & insurance5.7%
US avg: 5.5%
Professional, scientific, technical5.2%
US avg: 4.7%
Wholesale trade4.8%
US avg: 6.7%
Transportation & warehousing2.9%
US avg: 2.5%
Arts, entertainment, food2.1%
US avg: 2%
Education & health services0.5%
US avg: 0.8%
Agriculture, forestry, fishing0.4%
US avg: 1.7%
Construction0.4%
US avg: 1.2%
Manufacturing0%
US avg: 0.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$290,100
+34%inflation adjusted, since 2000
from $143,600 in 2000
US average: $265,253
1990 – 2024
Median gross rent
$1,311
+20%inflation adjusted, since 2000
from $727 in 2000
US average: $1,124
Owner-occupied
59.5%
−7.6 ptssince 2000
from 67.0% in 2000
40.5% rent
Persons per household
2.67 people
−3%since 2009
from 2.75 people in 2009
US average: 2.61
Afford Score
3.5
−20%since 2009
from 4.3 in 2009
2009 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
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%
2020
White, non-Hispanic43.5%(168,580)
Black18.7%(72,364)
Hispanic / Latino21.7%(84,177)
Asian12.5%(48,330)
Other2.2%(8,367)
Segregation Score
46
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Central American5.6%(20,733)
Puerto Rican5.2%(19,293)
Guatemalan4.2%(15,457)
South American2.6%(9,437)
Dominican1.6%(5,939)
Mexican1.5%(5,640)
Ecuadorian1.3%(4,954)
Colombian0.6%(2,265)
Costa Rican0.6%(2,061)
Honduran0.5%(1,815)
Peruvian0.3%(1,017)
Cuban0.3%(979)
+ 9 more hispanic origin groups with data
Spaniard0.2%(907)
Salvadoran0.2%(798)
Venezuelan0.2%(692)
Panamanian0.1%(435)
Argentine0.1%(280)
Nicaraguan0%(167)
Uruguayan0%(117)
Chilean0%(102)
Asian origin
Asian Indian6.5%(24,105)
Chinese2.4%(8,668)
Korean0.7%(2,560)
Filipino0.7%(2,455)
Pakistani0.3%(941)
Japanese0.2%(686)
Vietnamese0.1%(443)
Taiwanese0.1%(402)
Bangladeshi0.1%(398)
Burmese0%(114)
Cambodian0%(91)
Thai0%(75)
+ 7 more asian origin groups with data
Pacific Islander origin
Chamorro0%(171)
Samoan0%(72)
Ancestry
Italian11.6%(42,656)
Irish10.7%(39,382)
German9.7%(35,678)
English6%(21,965)
Polish5.3%(19,636)
West Indian2.5%(9,187)
American2.4%(8,708)
Russian1.8%(6,668)
Hungarian1.4%(5,337)
Haitian1.4%(5,127)
French1.3%(4,849)
+ 48 more ancestry groups with data
Scottish1%(3,508)
Dutch0.9%(3,319)
Jamaican0.7%(2,614)
Swedish0.6%(2,306)
Ukrainian0.6%(2,266)
Slovak0.5%(1,688)
British0.4%(1,612)
Greek0.4%(1,574)
Welsh0.4%(1,448)
Norwegian0.4%(1,429)
Scotch-Irish0.4%(1,290)
Lithuanian0.3%(1,283)
Romanian0.3%(1,051)
Austrian0.3%(1,038)
Ghanaian0.3%(996)
Danish0.2%(904)
Portuguese0.2%(870)
Canadian0.2%(797)
Egyptian0.2%(752)
Czech0.2%(694)
Turkish0.2%(638)
Arab0.1%(551)
Nigerian0.1%(540)
Brazilian0.1%(504)
Swiss0.1%(468)
Moroccan0.1%(428)
Guyanese0.1%(418)
Lebanese0.1%(407)
Israeli0.1%(353)
Armenian0.1%(296)
Belgian0.1%(293)
Kenyan0.1%(282)
Croatian0.1%(219)
Latvian0.1%(213)
Iranian0.1%(209)
Palestinian0.1%(191)
Australian0.1%(186)
Bulgarian0%(179)
Ethiopian0%(160)
Syrian0%(125)
Slovene0%(125)
Macedonian0%(110)
Barbadian0%(96)
Iraqi0%(95)
Serbian0%(87)
Finnish0%(65)
Section 05

Education

Bachelor's degree or higher
43.5%
+9.6 ptssince 2000
from 34.0% in 2000
US average: 32.9%
High school or higher
89.6%
+7.8 ptssince 2000
from 81.8% in 2000
US average: 88.5%
Graduate degree
20.4%
+4.9 ptssince 2000
from 15.5% in 2000
US average: 12.7%
Section 06

Commute & transportation

Average commute
28.6 min
+52%since 2000
from 18.7 min in 2000
US average: 26.9
Drive alone to work
68.5%
−3.3 ptssince 2009
from 71.8% in 2009
US average: 75.1%
No vehicle available
11.0%
−0.2 ptssince 2009
from 11.2% in 2009
US average: 8.4%
Section 07

Work & employment

Unemployment rate
6.0%
−3.0 ptssince 2011
from 9.0% in 2011
US average: 5.4%
Labor force participation
63.8%
−2.4 ptssince 2011
from 66.2% in 2011
US average: 63.4%
Women 20-64 in the labor force
73.8%
US average: 73.3%
Management & professional
46.6%
+3.7 ptssince 2009
from 42.9% in 2009
US average: 39.3%
Section 08

People & community

Male
48.9%
−0.3 ptssince 2009
from 49.2% in 2009
Female
51.1%
+0.3 ptssince 2009
from 50.8% in 2009
Foreign born
23.0%
+4.6 ptssince 2009
from 18.5% in 2009
US average: 13.5%
Uninsured
7.1%
−4.5 ptssince 2013
from 11.6% in 2013
US average: 8.8%
Computer in household
92.4%
US average: 91.9%
Same house as last year
86.4%
US average: 86.2%
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

Uninsured
7.1%
−4.5 ptssince 2013
from 11.6% in 2013
US average: 8.8%
Employer-based
66.5%
US average: 55.4%
Direct-purchase
10.0%
US average: 13.7%
Medicare
16.4%
US average: 17.6%
Medicaid
17.3%
US average: 20.0%
VA health care
0.9%
US average: 2.3%
Any private
74.1%
US average: 68.1%
Any public
31.2%
US average: 35.2%

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, 2020
Gulf War (2001 or later)15.7%(1,919)
US avg: 20.6%
Gulf War (1990s)13.6%(1,663)
US avg: 21.4%
Vietnam era34.9%(4,265)
US avg: 35.2%
Korean War10.2%(1,248)
US avg: 7.6%
World War II4.1%(505)
US avg: 2.9%

Share of the 12,236 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

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Head to head

Compare Mercer County to nearby counties

MERCER COUNTY VS
Middlesex County
Income$111,549+34%
Home value$462,900+60%
Population883,335+121%
SEE FULL COMPARISON →
MERCER COUNTY VS
Somerset County
Income$140,374+69%
Home value$552,100+90%
Population356,486−11%
SEE FULL COMPARISON →
MERCER COUNTY VS
Bucks County
Income$114,764+38%
Home value$445,700+54%
Population647,828+62%
SEE FULL COMPARISON →
MERCER COUNTY VS
Hunterdon County
Income$141,715+70%
Home value$517,200+78%
Population131,781−67%
SEE FULL COMPARISON →
Frequently asked

How many people live in Mercer County, New Jersey?

Mercer County, New Jersey has about 387,340 residents according to the 2020 American Community Survey.

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

The typical household in Mercer County, New Jersey earns about $83,306 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 $290,100, and the typical rent is about $1,311 a month.

How educated are people in Mercer County, New Jersey?

About 43.5% 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 11.1% of people in Mercer County, New Jersey live below the federal poverty line.

Has Mercer County, New Jersey grown since 1990?

Yes, Mercer County, New Jersey has grown since 1990. The population has added about 61,516 residents, a change of about 19 percent over that period.

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

How we source and harmonize this data →