How Middlesex County Compares

Middlesex County

39.5 years

New Jersey Average

39.5 years

Rank #15 of 21 in state

National

38.9 years

1.5% above

National Distribution

Where Middlesex County falls among all 3,222 U.S. counties for median age.

21.4 years 86.2 years

■ Middlesex County: 39.5 years

Ranking Context

Rank	County	Value
#2,263	Butler County, MO	39.5 years
#2,264	St. Francois County, MO	39.5 years
#2,265	Mercer County, NJ	39.5 years
#2,266	Middlesex County, NJ	39.5 years
#2,267	Bernalillo County, NM	39.5 years
#2,268	Lee County, NC	39.5 years
#2,269	Dickey County, ND	39.5 years

View full ranking →

Median Age in Middlesex County, New Jersey

Middlesex County, New Jersey has a median age of 39.5 years, which ranks #2,266 of 3,222 out of 3,222 counties nationwide. This is 1.5% above the national value of 38.9 years.

Within New Jersey, Middlesex County ranks #15 of 21 out of 21 counties. This places it in the 30th percentile nationally.

The median age of the total population. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.

About this data

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.