In 2018, Buchanan County, IA had a population of 21.1k people with a median age of 38.7 and a median household income of $61,409. Between 2017 and 2018 the population of Buchanan County, IA grew from 21,101 to 21,125, a 0.114% increase and its median household income grew from $59,348 to $61,409, a 3.47% increase.
The 5 largest ethnic groups in Buchanan County, IA are White (Non-Hispanic) (96.3%), Two+ (Non-Hispanic) (1.22%), White (Hispanic) (1.14%), Asian (Non-Hispanic) (0.582%), and Two+ (Hispanic) (0.336%). 0% of the people in Buchanan County, IA speak a non-English language, and 99.7% are U.S. citizens.
In 2018, the median property value in Buchanan County, IA was $138,000, and the homeownership rate was 78.3%. Most people in Buchanan County, IA drove alone to work, and the average commute time was 21.5 minutes. The average car ownership in Buchanan County, IA was 2 cars per household.