COUNTY
Mercer County
New Jersey · 399,289 residents (2025 est.) · 224.478 sq mi
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Part of the Trenton metro area
The short version
Mercer County is wealthier than most US places, with a median household income of $100,645. Population has held roughly steady since 2000. 45% of adults hold a bachelor's degree or higher. Median home value has more than doubled since 2000, reaching $377,700. It ranks in the top 1% of US counties for household income.
At a glance
Wealthier
above the US median
US median: $82,259
Mid-age
median age 39.5
US median: 38.9
More educated
45% hold a bachelor's degree
US average: 36%
Less affordable
home values up 44%, inflation adjusted
US median home: $376,019
Section 01
Population & growth
PEP 2025 EST:399,289 residents (Census Bureau Vintage 2025, released March 2026)
Population, 1990 – 2024
2024386K
Age distribution, 2024
Under 55.6%(21,584)
5 to 95.8%(22,566)
10 to 146.6%(25,592)
15 to 197.1%(27,559)
20 to 247%(26,952)
25 to 3412.4%(47,759)
35 to 4413.1%(50,384)
45 to 5413.4%(51,806)
55 to 6413%(50,105)
65 to 749.3%(35,990)
75 to 844.6%(17,645)
85 and over2.1%(7,922)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$100,645
−2%inflation adjusted, since 2000
from $56,613 in 2000
US average: $82,259
1990 – 2024
Households earning $100K+
61.2%
+13.0 ptssince 2009
from 48.2% in 2009
US average: 53.3%
Workforce by industry, 2024
Information8.7%
Other services7.9%
Retail trade7.8%
Public administration6.9%
Finance & insurance6.4%
Professional, scientific, technical5.9%
Wholesale trade5.4%
Transportation & warehousing3%
Arts, entertainment, food2.1%
Education & health services0.5%
Agriculture, forestry, fishing0.3%
Construction0.2%
Manufacturing0%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$377,700
+44%inflation adjusted, since 2000
from $143,600 in 2000
US average: $376,019
1990 – 2024
3.8
−14%since 2009
from 4.3 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
30
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
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%
2024
White, non-Hispanic42.7%(164,891)
Black17.9%(69,099)
Hispanic / Latino23.1%(89,099)
Asian12.3%(47,553)
Other3.9%(15,222)
89
+19%since 2009
from 75 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
44
−5%since 2020
from 46 in 2020
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 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)
Paraguayan0%(16)
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
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)
Subsaharan African2%(7,883)
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)
French Canadian0.2%(589)
Swiss0.1%(485)
Trinidadian & Tobagonian0.1%(472)
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)
Australian0%(58)
Jordanian0%(54)
Macedonian0%(20)
Somali0%(8)
Section 05
Education
High school or higher
89.4%
+7.6 ptssince 2000
from 81.8% in 2000
US average: 89.6%
Section 06
Commute & transportation
Section 07
Work & employment
Section 08
People & community
Marital status
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
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Compare Mercer County to nearby counties
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Income$111,549+11%
Home value$462,900+23%
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MERCER COUNTY VS
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MERCER COUNTY VS
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MERCER COUNTY VS
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Frequently asked
How many people live in Mercer County, New Jersey?
Mercer County, New Jersey has about 385,864 residents according to the 2024 American Community Survey.
What is the median household income in Mercer County, New Jersey?
The typical household in Mercer County, New Jersey earns about $100,645 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 $377,700, and the typical rent is about $1,623 a month.
How educated are people in Mercer County, New Jersey?
About 45.4% 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 10.3% 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 60,040 residents, a change of about 18 percent over that period.
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84 census tracts (top 20 by population)
Census Tract 25Census Tract 44.04Census Tract 32.01Census Tract 43.11Census Tract 44.07Census Tract 33.01Census Tract 37.03Census Tract 27.02Census Tract 38Census Tract 43.07Census Tract 45.01Census Tract 28Census Tract 35Census Tract 4Census Tract 21Census Tract 22Census Tract 42.04Census Tract 5Census Tract 39.04Census Tract 44.0322 ZIP codes
ZIP 08540ZIP 08618ZIP 08610ZIP 08611ZIP 08648ZIP 08520ZIP 08619ZIP 08638ZIP 08550ZIP 08690ZIP 08691ZIP 08609ZIP 08534ZIP 08629ZIP 08620ZIP 08628ZIP 08525ZIP 08544ZIP 08560ZIP 08542ZIP 08608ZIP 08561Up the hierarchy
All counties in New JerseyDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024