Total Population in Johnson County, KS
ACS 2024 5-Year Estimates
620,631
Rank #112/3,222 · #1 in KS
97th
Johnson 620,631
KS 2,947,197 -78.9%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Johnson County's total population of 620,631 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 →| #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 |
| #113 | Pasco County, FL | 611,444 |
| #114 | Washington County, OR | 603,947 |
| #115 | Anne Arundel County, MD | 598,166 |
About Total Population
Johnson County, Kansas has a total population of 620,631, ranking #112 of 3,222 counties nationwide — 99.8% below the national value of 330M. Within Kansas, it ranks #1 of 105. This places it in the 97th 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.