Buchanan County Population 2018

Buchanan County's estimated population is 20,992 with a growth rate of -0.44% 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
201620,992-92-0.44%
201521,084-36-0.17%
201421,1201240.59%
201320,996320.15%
201220,964630.30%
201120,901-57-0.27%
201020,9581140.55%
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
White20,61098.18%
Two or More Races2191.04%
Black or African American1040.50%
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