Total Population in Monmouth County, NJ
ACS 2024 5-Year Estimates
How Monmouth County Compares
National Distribution
Where Monmouth County falls among all 3,222 U.S. counties for total population.
■ Monmouth County: 645,353
Ranking Context
| Rank | County | Value |
|---|---|---|
| #106 | Arapahoe County, CO | 659,844 |
| #107 | Ocean County, NJ | 654,362 |
| #108 | Bucks County, PA | 647,461 |
| #109 | Monmouth County, NJ | 645,353 |
| #110 | Brevard County, FL | 632,780 |
| #111 | Western Connecticut Planning Region, CT | 627,071 |
| #112 | Johnson County, KS | 620,631 |
Total Population in Monmouth County, New Jersey
Monmouth County, New Jersey has a total population of 645,353, which ranks #109 of 3,222 out of 3,222 counties nationwide. This is 99.8% below the national value of 330M.
Within New Jersey, Monmouth County ranks #6 of 21 out of 21 counties. This places it in the 97th percentile nationally.
Total population count from the American Community Survey. 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.