Polk County Population 2017

Polk County's estimated population is 474,045 with a growth rate of 1.58% in the past year according to the most recent United States census data. Polk County is the 1st largest county in Iowa.

Year Population Growth Growth Rate
2016474,0457,3571.58%
2015466,6886,9081.50%
2014459,7808,3191.84%
2013451,4617,6401.72%
2012443,8216,0141.37%
2011437,8075,5251.28%
2010432,282105,14232.14%
1990327,14023,9707.91%
1980303,17017,0695.97%
1970286,10119,7867.43%
1960266,31540,30517.83%
1950226,01030,17515.41%
1940195,83522,99813.31%
1930172,83718,80812.21%
1920154,02943,59139.47%
1910110,43827,81433.66%
190082,62417,21426.32%
189065,41023,01554.29%
188042,39514,53852.19%
187027,85716,232139.63%
186011,6257,112157.59%
18504,5130.00%

Polk County Population Growth

Population Data via

Polk County Race Data

Race Population Percentage
White401,68384.74%
Black or African American31,4286.63%
Asian20,6634.36%
Two or More Races10,6392.24%
American Indian and Alaska Native1,9210.41%
Native Hawaiian and Other Pacific Islander3540.07%

Polk County Population Pyramid

0k5k10k15k20kPolk County Male Population0k5k10k15k20kPolk County Female Population

Population of Cities in Polk County

City 2010 Census 2016 Estimated Growth Growth Rate
Des Moines204190215472112825.53%
West Des Moines5670364560785713.86%
Ankeny45582586271304528.62%
Urbandale394594301835599.02%
Johnston1726621114384822.29%
Altoona1454617938339223.32%
Clive1541217546213413.85%
Grimes825511909365444.26%
Pleasant Hill8788975096210.95%
Bondurant38605796193650.16%
Windsor Heights486049831232.53%
Polk City34184428101029.55%
Mitchellville225424051516.70%
Elkhart68378310014.64%
Runnells507523163.16%
Alleman432455235.32%
Sheldahl31932120.63%
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