Total Population in Buchanan County, IA
ACS 2024 5-Year Estimates
20,694
Rank #1,840/3,222 · #31 in IA
43th
Buchanan 20,694
IA 3,210,507 -99.4%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Buchanan County's total population of 20,694 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 Buchanan County for total population.
Nearby Rankings
Full ranking →| #1,837 | Texas County, OK | 20,774 |
| #1,838 | Buena Vista County, IA | 20,753 |
| #1,839 | Shelby County, IL | 20,720 |
| #1,840 | Buchanan County, IA | 20,694 |
| #1,841 | Kewaunee County, WI | 20,664 |
| #1,842 | Uinta County, WY | 20,644 |
| #1,843 | Perry County, IL | 20,639 |
About Total Population
Buchanan County, Iowa has a total population of 20,694, ranking #1,840 of 3,222 counties nationwide — 100.0% below the national value of 330M. Within Iowa, it ranks #31 of 99. This places it in the 43th 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.