Mercer County, NJ

County

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US Senator
Cory Booker
Democratic Party
US Senator
Andy Kim
Democratic Party
2024 Median Age
39.5
0.765% 1-year increase
2024 Median Property Value
$377,700
7.61% 1-year growth

About

None of the households in Mercer County, NJ reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.

85.4% of the residents in Mercer County, NJ are U.S. citizens.

In 2024, the median property value in Mercer County, NJ was $377,700, and the homeownership rate was 62.2%.

About the photo: State Capitol Rotunda, Trenton, NJ
Photo by Peter Miller
United StatesNew JerseyTrenton, NJ

Population & Diversity

Mercer County, NJ is home to a population of N/A people, from which 85.4% are citizens. As of N/A, NaNM% of Mercer County, NJ residents were born outside of the country (N/A people).

Population & Diversity

Citizenship

85.4%
2024 Citizenship
86.6%
2023 Citizenship

As of 2024, 85.4% of Mercer County, NJ residents were US citizens, which is lower than the national average of 93.2%. In 2023, the percentage of US citizens in Mercer County, NJ was 86.6%, meaning that the rate of citizenship has been decreasing.

The following chart shows US citizenship percentages in Mercer County, NJ compared to that of it's neighboring and parent geographies.

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Economy

Industries

Employment by Industry Sector

Data is only available at the state level. Showing data for New Jersey.
Y-Axis
2.27%
Year-over-year growth
Employment change between February 2022 and February 2023

As of February 2023, there are 4.24M people employed in New Jersey. This represents a 2.27% increase in employment when compared to February 2022.

Right after the beginning of the COVID-19 pandemic, during April 2020, a general dip can be seen across industry sectors, resulting in an overall decline in employment by 16.5%.

The following chart shows monthly employment numbers for each industry sector in New Jersey.

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Civics

In the 2024 presidential election, the popular vote in New Jersey went to Kamala Harris with 52% of the vote. The runner-up was Donald J. Trump (46.1%), followed by Jill Stein (0.914%).

Cory Booker and Andy Kim are the senators currently representing the state of New Jersey. In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

New Jersey is currently represented by 11 members in the U.S. house, and members of the House of Representives are elected to 2-year terms.

Presidential Elections

Voting results are not available for Mercer County, NJ. Showing the available data for New Jersey.
2024 Election Results
  1. Kamala Harris (52%)
    Democratic Party
  2. Donald J. Trump (46.1%)
    Republican Party
  3. Jill Stein (0.914%)
    Green Party

In the 2024 presidential election, the popular vote in New Jersey went to Kamala Harris with 52% of the vote. The runner-up was Donald J. Trump (46.1%), followed by Jill Stein (0.914%).

The following chart shows the popular vote results in New Jersey for each registered party from 1976 to 2024.

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Senator Elections

US Senators from New Jersey

Senatorial voting results are only available at the state level. Showing data for New Jersey.
Cory Booker
Senator from New Jersey2
Assumed office on October 31, 2013
Elected to the seat to succeed Jeffrey Chiesa, who had been appointed to the seat following the death of Frank Lautenberg.{{Cite news |url=https://www.politico.com/story/2013/10/cory-booker-new-jersey-senate-election-098436 |title=Booker Wins New Jersey Senate Seat |work=Politico |access-date=May 21, 2020 }}
Andy Kim
Senator from New Jersey1
Assumed office on December 8, 2024
Elected to the seat to succeed George Helmy, who had been appointed to the seat following the resignation of Bob Menendez.

Cory Booker and Andy Kim are the senators currently representing New Jersey.

In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

The following chart shows elected senators in New Jersey over time, excluding special elections, colored by their political party.

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Housing & Living

The median property value in Mercer County, NJ was $377,700 in 2024, which is 1.14 times larger than the national average of $332,700. Between 2023 and 2024 the median property value increased from $351,000 to $377,700, a 7.61% increase. The homeownership rate in Mercer County, NJ is 62.2%, which is lower than the national average of 65.2%.

In 2025, 18.7% of the population was living with severe housing problems in Mercer County, NJ. From 2014 to 2025, the indicator grew 0.17%.

Housing

Property

$377,700
Median Property Value 2024
±$6,110
$89,569
Median Property Taxes
±$2,115

The following chart display owner-occupied housing units distributed between a series of property tax buckets compared to the national averages for each bucket. In Mercer County, NJ the largest share of households pay taxes in the $3k+ range.

The chart underneath the paragraph shows the property taxes in Mercer County, NJ compared to it's parent and neighbor geographies.

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Rent vs Own

62.2%
Homeownership
2024
61%
Homeowners with Mortgage
2024

In 2024, 62.2% of the housing units in Mercer County, NJ were occupied by their owner. This percentage grew from the previous year's rate of 61.9%.

This chart shows the percentage of owner in Mercer County, NJ compared it's parent and neighboring geographies.

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Transportation

Car Ownership

2 cars
Average Number

The following chart displays the households in Mercer County, NJ distributed between a series of car ownership buckets compared to the national averages for each bucket. The largest share of households in Mercer County, NJ have 2 cars.

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Poverty

Severe Housing Problems

In 2025, 18.7% of the population was living with severe housing problems in Mercer County, NJ. From 2014 to 2025, the indicator grew 0.17%.

The graph shows the trend of the percentage of the population living with severe housing problems.

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Children in Poverty

In 2025, 13.1% of the children was living in poverty in Mercer County, NJ. From 2014 to 2025, the indicator declined 1.5%.

The graph shows the trend of the percentage of the children living in poverty.

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Security

Crimes & Accidents

Indicator

In 2022, the number of reported violent crimes offenses per 100,000 population was 375 in Mercer County, NJ. From 2014 to 2022, the indicator declined 74 per 100,000 population.

The graph shows the trend in the number of reported violent crimes offenses per 100,000 population.

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Health

N/A% of the population of Mercer County, NJ has health coverage, with N/A% on employee plans, N/A% on Medicaid, N/A% on Medicare, N/A% on non-group plans, and N/A% on military or VA plans.

By gender, of the total number of insured persons, N/A were men and N/A were women.

Health Indicators

Clinical Care

Indicator

In 2025, the percentage of population under age 65 without health insurance was 8.72% in Mercer County, NJ.

The graphic shows the trend of the indicator in Mercer County, NJ.

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