Median Age in Union County, NJ
ACS 2024 5-Year Estimates
39.1 years
Rank #2,361/3,222 · #16 in NJ
27th
Union 39.1 years
NJ 40.1 years -2.5%
US 38.9 years +0.5%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Union County's median age of 39.1 years compares to all 3,222 U.S. counties. Values range from 21.4 years to 86.2 years.
Distribution of Median Age Across All Counties
Ranking Context
Counties ranked closest to Union County for median age.
Nearby Rankings
Full ranking →| #2,358 | Madison County, MS | 39.1 years |
| #2,359 | Platte County, MO | 39.1 years |
| #2,360 | Clay County, NE | 39.1 years |
| #2,361 | Union County, NJ | 39.1 years |
| #2,362 | Gaston County, NC | 39.1 years |
| #2,363 | Love County, OK | 39.1 years |
| #2,364 | Rogers County, OK | 39.1 years |
About Median Age
Union County, New Jersey has a median age of 39.1 years, ranking #2,361 of 3,222 counties nationwide — 0.5% above the national value of 38.9 years. Within New Jersey, it ranks #16 of 21. This places it in the 27th percentile nationally.
The median age of the total population. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.