Polk County, Iowa Population 2022

Polk County, Iowa's estimated population is 503,145 with a growth rate of 0.87% in the past year according to the most recent United States census data. Polk County, Iowa is the 2nd largest county in Iowa. The 2010 Population was 432,352 and has seen a growth of 16.37% since this time.

Note: 2021 and 2022 data is projected
Year Population Growth Annual Growth Rate
18504,5130.00%
186011,6257,112157.59%
187027,85716,232139.63%
188042,39514,53852.19%
189065,41023,01554.29%
190082,62417,21426.32%
1910110,43827,81433.66%
1920154,02943,59139.47%
1930172,83718,80812.21%
1940195,83522,99813.31%
1950226,01030,17515.41%
1960266,31540,30517.83%
1970286,10119,7867.43%
1980303,17017,0695.97%
1990327,14023,9707.91%
2010432,352105,21232.16%
2011438,7376,3851.48%
2012444,6715,9341.35%
2013452,6577,9861.80%
2014460,8988,2411.82%
2015467,3046,4061.39%
2016474,2776,9731.49%
2017480,4876,2101.31%
2018485,8335,3461.11%
2019490,1614,3280.89%
2020494,4894,3280.88%
2021498,8174,3280.88%
2022503,1454,3280.87%
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Polk County, Iowa Population Growth

Population by Race

Race Population Percentage
White400,88282.58%
Black or African American33,8086.96%
American Indian and Alaska Native1,1800.24%
Asian23,2354.79%
Native Hawaiian and Other Pacific Islander4170.09%
Some Other Race8,5381.76%
Two or More Races17,3583.58%
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Polk County, Iowa Population by Race

Polk County, Iowa Population Pyramid 2022

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Polk County, Iowa Median Age

35.7


Total

34.8


Male

36.6


Female

Polk County, Iowa Adults

There are 364,708 adults, (63,436 of whom are seniors) in Polk County, Iowa.

Polk County, Iowa Age Dependency

Age Dependency Ratio

21.1

Old Age Dependency Ratio

40.1

Child Dependency Ratio

Polk County, Iowa Sex Ratio

Female

246,180

50.72%

Male

239,238

49.28%

Polk County, Iowa Population by Age

Polk County, Iowa Renter vs Owner Occupied by Household Type

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Polk County, Iowa Household Types

Type Owner Renter
Married86%14%
Male67.8%32.2%
All67.1%32.9%
Female50.1%49.9%
Non Family49.6%50.4%

67.1%

Rate of Home Ownership

Polk County, Iowa Households and Families

Type Count Average Size Owned
All191,1252.4967.1
Married87,1463.1986
Male8,4083.2867.8
Female21,5663.550.1
Non Family74,0051.349.6

3.15

Average Family Size

2.49

Average Household Size

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Polk County, Iowa Households by Type

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Education Attained Count Percentage
Less Than 9th Grade11,8653.68%
9th to 12th Grade13,5624.20%
High School Graduate79,88424.77%
Some College63,71219.75%
Associates Degree32,36510.03%
Bachelors Degree83,76725.97%
Graduate Degree37,40911.60%
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Polk County, Iowa Educational Attainment by Sex (over 25)

Polk County, Iowa Educational Attainment by Race

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Race Total High School Bachelors
White265,329254,473107,946
Islander283210112
Asian14,74010,5355,294
2+ Races5,8774,8631,926
Black18,26715,3943,578
Native American704622104
Hispanic19,55112,4102,563
Other Race4,2522,336422

The highest rate of high school graduation is among white people with a rate of 95.91%.

The highest rate of bachelors degrees is among white people with a rate of 40.68%.

Polk County, Iowa Educational Attainment by Race

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Name Average Male Female
Overall$45,900$52,453$38,973
Less Than 9th Grade$28,924$34,352$21,766
High School Graduate$33,133$39,481$26,135
Some College$41,070$48,128$33,979
Bachelors Degree$58,494$67,562$51,038
Graduate Degree$74,173$92,010$64,591

$45,900

Average Earnings

$52,453

Average Male

$38,973

Average Female

Polk County, Iowa Earnings by Educational Attainment

Polk County, Iowa Language by Age

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Polk County, Iowa Language

86.58% of Polk County, Iowa residents speak only English, while 13.42% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 5.71% of the population.

Polk County, Iowa Language

Polk County, Iowa Poverty by Race

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Name Total In Poverty Poverty Rate
Black32,8529,07827.63%
Islander41710525.18%
Multiple17,0773,97923.30%
Hispanic40,6738,49620.89%
Native1,09616815.33%
Asian23,0732,47610.73%
White367,01226,6307.26%
Other2,036NaN%

10.36%

Overall Poverty Rate

9.29%

Male Poverty Rate

11.39%

Female Poverty Rate

Poverty in Polk County, Iowa

The race most likely to be in poverty in Polk County, Iowa is Black, with 27.63% below the poverty level.

The race least likely to be in poverty in Polk County, Iowa is Other, with NaN% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.08%. Among those working part-time, it was 14.92%, and for those that did not work, the poverty rate was 19.01%.

Polk County, Iowa Poverty

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Name Poverty
Less Than 9th Grade23.75%
High School10.67%
Some College7.96%
Bachelors or Greater3.11%

Polk County, Iowa Poverty Rate by Education

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Rate Poverty
Male Employed3.67%
Male Unemployed22.86%
Female Employed6.44%
Female Unemployed34.64%

Polk County, Iowa Poverty Rate by Employment Status and Sex

Polk County, Iowa Income by Household Type

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Name Median Mean
Households$69,747$89,908
Families$86,525$107,375
Married Families$102,184$124,191
Non Families$45,673$58,014
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Income by Household Type

Polk County, Iowa Marital Status

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Marriage Rates

48.4%

Overall Marriage Rate

49.8%

Male Marriage Rate

47.0%

Female Marriage Rate

Polk County, Iowa Married by Age and Sex

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Polk County, Iowa Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Polk County, Iowa Marital Status by Race

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Polk County, Iowa Marital Status

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23,183

Number of Veterans

Male Veterans

Female Veterans

War Veterans
Second Gulf War4,738
First Gulf War4,815
Vietnam7,337
Korea1,639
World War II725

Polk County, Iowa Veterans by War

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Age Group Veterans
18 to 342,503
35 to 545,591
55 to 644,240
65 to 745,594
75+5,255

Polk County, Iowa Veterans by Age

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Name Veterans % of Total
White21,5996.96%
Black8473.89%
Native American14916.48%
Asian2041.19%
Islander3612.72%
Other Race1092.10%
2+ Races2392.84%
Hispanic5482.25%

Polk County, Iowa Veterans by Race

Polk County, Iowa Veterans by Education

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6.85%

Veteran Poverty Rate

26.96%

Veteran Disability Rate

Polk County, Iowa Veterans by Education

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71.7%

Labor Force Participation

68.2%

Employment Rate

4.6%

Unemployment Rate

Polk County, Iowa Employment by Age

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Polk County, Iowa Employment by Race

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Polk County, Iowa Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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68.20%

Born in Polk County, Iowa

90.91%

Native Born

9.09%

Foreign Born

5.05%

Non Citizen

4.04%

Naturalized

Place of Birth

90.91% of Polk County, Iowa residents were born in the United States, with 68.20% having been born in Iowa. 5.05% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Polk County, Iowa Place of Birth

  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

Sources