Total Population in DeKalb County, IL
ACS 2024 5-Year Estimates
100,703
Rank #616/3,222 · #20 in IL
81th
DeKalb 100,703
IL 13M -99.2%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How DeKalb County's total population of 100,703 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 DeKalb County for total population.
Nearby Rankings
Full ranking →| #613 | Laramie County, WY | 101,060 |
| #614 | Cleveland County, NC | 100,991 |
| #615 | Columbiana County, OH | 100,704 |
| #616 | DeKalb County, IL | 100,703 |
| #617 | Burleigh County, ND | 100,600 |
| #618 | Sherburne County, MN | 100,560 |
| #619 | Story County, IA | 100,466 |
About Total Population
DeKalb County, Illinois has a total population of 100,703, ranking #616 of 3,222 counties nationwide — 100.0% below the national value of 330M. Within Illinois, it ranks #20 of 102. This places it in the 81th 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.