Sioux County Population 2018

Sioux County's estimated population is 34,860 with a growth rate of -0.09% in the past year according to the most recent United States census data. Sioux County is the 20th largest county in Iowa.

Year Population Growth Growth Rate
201734,860-31-0.09%
201634,8912040.59%
201534,6871210.35%
201434,5661120.33%
201334,4541850.54%
201234,2692850.84%
201133,9842470.73%
201033,7373,83412.82%
199029,903-910-2.95%
198030,8132,81710.06%
197027,9961,6216.15%
196026,375-6-0.02%
195026,381-828-3.04%
194027,2094031.50%
193026,8063481.32%
192026,4581,2104.79%
191025,2481,9118.19%
190023,3374,96727.04%
189018,37012,944238.56%
18805,4264,850842.01%
18705765665660.00%
1860100.00%

Sioux County Population Growth

Population Data via

Sioux County Race Data

Race Population Percentage
White33,66496.57%
Asian3430.98%
Black or African American2790.80%
Two or More Races2630.75%
American Indian and Alaska Native1850.53%
Native Hawaiian and Other Pacific Islander180.05%

Sioux County Population Pyramid

0k1k1k2k Male Population0k1k1k2k 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