Total Population in Mercer County, OH
ACS 2024 5-Year Estimates
42,484
Rank #1,157/3,222 · #57 in OH
64th
Mercer 42,484
OH 12M -99.6%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Mercer County's total population of 42,484 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 →| #1,154 | Pierce County, WI | 42,584 |
| #1,155 | Upshur County, TX | 42,567 |
| #1,156 | Muscatine County, IA | 42,559 |
| #1,157 | Mercer County, OH | 42,484 |
| #1,158 | Union County, PA | 42,456 |
| #1,159 | Baxter County, AR | 42,407 |
| #1,160 | Hendry County, FL | 42,382 |
About Total Population
Mercer County, Ohio has a total population of 42,484, ranking #1,157 of 3,222 counties nationwide — 100.0% below the national value of 330M. Within Ohio, it ranks #57 of 88. This places it in the 64th 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.