Total Population in Johnson County, IA
ACS 2024 5-Year Estimates
156,639
Rank #443/3,222 · #4 in IA
86th
Johnson 156,639
IA 3,210,507 -95.1%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Johnson County's total population of 156,639 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 Johnson County for total population.
Nearby Rankings
Full ranking →| #440 | Ouachita Parish, LA | 158,480 |
| #441 | Franklin County, PA | 157,379 |
| #442 | Alexandria city, VA | 156,976 |
| #443 | Johnson County, IA | 156,639 |
| #444 | Bibb County, GA | 156,578 |
| #445 | Santa Fe County, NM | 156,105 |
| #446 | Merrimack County, NH | 155,967 |
About Total Population
Johnson County, Iowa has a total population of 156,639, ranking #443 of 3,222 counties nationwide — 100.0% below the national value of 330M. Within Iowa, it ranks #4 of 99. This places it in the 86th 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.