Total Population in Mercer County, NJ
ACS 2024 5-Year Estimates
385,864
Rank #193/3,222 · #12 in NJ
94th
Mercer 385,864
NJ 9,343,809 -95.9%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Mercer County's total population of 385,864 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to Mercer County for total population.
Nearby Rankings
Full ranking →| #190 | Brazoria County, TX | 391,255 |
| #191 | Forsyth County, NC | 389,977 |
| #192 | Bell County, TX | 386,897 |
| #193 | Mercer County, NJ | 385,864 |
| #194 | Lane County, OR | 384,207 |
| #195 | Horry County, SC | 383,016 |
| #196 | Lehigh County, PA | 378,792 |
About Total Population
Mercer County, New Jersey has a total population of 385,864, ranking #193 of 3,222 counties nationwide — 99.9% below the national value of 330M. Within New Jersey, it ranks #12 of 21. This places it in the 94th percentile nationally.
Total population count from the American Community Survey. 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.