Data / Rankings / Median age / Counties in New Jersey

Counties in New Jersey by median age

Cape May County had the highest median age of 21 counties in 2023, at 51.4 years. Hudson County had the lowest, at 35.8 years. The median was 41.7 years and the figure for New Jersey was 40.1 years. Source: the U.S. Census Bureau.

Highest51.4Cape May County
Lowest35.8Hudson County
Median41.721 counties
New Jersey40.1History

All counties, 2023

CSVChart (SVG)

Cape May CountyCape May County: 51.4 years51.4Hunterdon CountyHunterdon County: 46.2 years46.2Sussex CountySussex County: 44.1 years44.1Warren CountyWarren County: 43.9 years43.9Monmouth CountyMonmouth County: 43.2 years43.2Morris CountyMorris County: 42.7 years42.7Atlantic CountyAtlantic County: 42.2 years42.2Bergen CountyBergen County: 42.1 years42.1Salem CountySalem County: 41.9 years41.9Somerset CountySomerset County: 41.9 years41.9Burlington CountyBurlington County: 41.7 years41.7Ocean CountyOcean County: 41.4 years41.4Gloucester CountyGloucester County: 40.1 years40.1Middlesex CountyMiddlesex County: 39.4 years39.4Mercer CountyMercer County: 39.2 years39.2Union CountyUnion County: 39.1 years39.1Camden CountyCamden County: 38.8 years38.8Passaic CountyPassaic County: 38.1 years38.1Essex CountyEssex County: 37.7 years37.7Cumberland CountyCumberland County: 37.6 years37.6Hudson CountyHudson County: 35.8 years35.8
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2023
years		Change on 2022
1Cape May County51.4+0.5
2Hunterdon County46.2-0.2
3Sussex County44.1-0.4
4Warren County43.9-0.1
5Monmouth County43.2-0.1
6Morris County42.70
7Atlantic County42.2+0.2
8Bergen County42.1+0.1
9Salem County41.9+0.1
9Somerset County41.9-0.1
11Burlington County41.70
12Ocean County41.4-0.4
13Gloucester County40.1-0.1
14Middlesex County39.4+0.3
15Mercer County39.2-0.1
16Union County39.1+0.1
17Camden County38.8+0.1
18Passaic County38.1+0.3
19Essex County37.7+0.1
20Cumberland County37.6-0.3
21Hudson County35.8+0.2

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b01002.dat. Retrieved 2026-10-08.

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Rank Counties in New Jersey by median age using official data, and cite the source.
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Questions

Which county has the highest median age?

Cape May County, with 51.4 years in 2023, according to the U.S. Census Bureau.

Which county has the lowest median age?

Hudson County, with 35.8 years in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in New Jersey: more rankings