Buchanan County Population 2018

Buchanan County's estimated population is 21,202 with a growth rate of 0.80% in the past year according to the most recent United States census data. Buchanan County is the 29th largest county in Iowa.

Year Population Growth Growth Rate
201721,2021680.80%
201621,034-75-0.36%
201521,109-26-0.12%
201421,1351080.51%
201321,027290.14%
201220,998870.42%
201120,911-66-0.31%
201020,9771330.64%
199020,844-2,056-8.98%
198022,9001,1545.31%
197021,746-547-2.45%
196022,2933661.67%
195021,9279364.46%
194020,9911,4417.37%
193019,550-340-1.71%
192019,8901420.72%
191019,748-1,679-7.84%
190021,4272,43012.79%
189018,9974512.43%
188018,5461,5128.88%
187017,0349,128115.46%
18607,9067,3891429.21%
18505170.00%

Buchanan County Population Growth

Population Data via

Buchanan County Race Data

Race Population Percentage
White20,61097.21%
Two or More Races2191.03%
Black or African American1040.49%
Asian990.47%
American Indian and Alaska Native510.24%
Native Hawaiian and Other Pacific Islander10.00%

Buchanan County Population Pyramid

0k0k0k1k1k Male Population0k0k0k1k1k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990