Buchanan County's estimated 2026 population is 21,055 with a growth rate of 0.82% in the past year according to the most recent United States census data. Buchanan County is the 30th largest county in Iowa. The 2010 population was 20,975 and has seen a growth of 0.38% since that time.
Data after 2023 is projected based on recent change
Overall: 40.3 years
Female: 41.5 years
Male: 39 years
There are 15,443 adults, (3,855 of whom are seniors) in Buchanan County.
Female: 10,258 (49.6%)
Male: 10,436 (50.4%)
The racial composition of Buchanan County includes 95.98% White, and smaller percentages for Two or more races, Black or African American, other race, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 19,862 | 95.98% |
| Two or more races | 517 | 2.5% |
| Black or African American | 124 | 0.6% |
| Other race | 80 | 0.39% |
| Native American | 58 | 0.28% |
| Asian | 40 | 0.19% |
| Native Hawaiian or Pacific Islander | 13 | 0.06% |
Buchanan County's average per capita income is $48,602. Household income levels show a median of $78,236. The poverty rate stands at 8.6%.
Name | Median | Mean |
|---|---|---|
| Married Families | $106,377 | - |
| Families | $94,220 | $104,751 |
| Households | $78,236 | $89,957 |
| Non Families | $40,221 | $53,023 |
Average Income
Median Household Income
Poverty Rate