Polk County, Iowa Population 2023

510,929

Polk County, Iowa's estimated 2023 population is 510,929 with a growth rate of 1.22% in the past year according to the most recent United States census data. Polk County, Iowa is the largest county in Iowa. The 2010 population was 430,640 and has seen a growth of 18.64% since that time.

Note: data after 2021 is projected based on recent change
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Polk County, Iowa Population 2023

Population by Race

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White

Black or African American

Asian

Two or more races

Other race

Native American

Native Hawaiian or Pacific Islander

Polk County, Iowa Population by Race

Polk County, Iowa Population Pyramid 2023

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

61.1

Age Dependency Ratio

21.1

Old Age Dependency Ratio

40.1

Child Dependency Ratio

Polk County, Iowa Sex Ratio

Female246,18050.72%
Male239,23849.28%

Polk County, Iowa Population by Age

Polk County, Iowa Renter vs Owner Occupied by Household Type

3.15

Average Family Size

2.49

Average Household Size

67.1%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Polk County, Iowa Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Polk County, Iowa Educational Attainment by Sex (over 25)

Polk County, Iowa Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among white people with a rate of 82.69%.

The highest rate of bachelors degrees is among islander people with a rate of 36.01%.

Polk County, Iowa Educational Attainment by Race

All

Male

Female

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$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

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

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

rate

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12.86%

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 Multiple, with 41.07% below the poverty level.

The race least likely to be in poverty in Polk County, Iowa is White, with 8.65% 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

rate

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Polk County, Iowa Poverty Rate by Education

rate

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Polk County, Iowa Poverty Rate by Employment Status and Sex

Polk County, Iowa Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Polk County, Iowa Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

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

male

female

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

Married

Widowed

Divorced

Separated

NeverMarried

Polk County, Iowa Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

23,183

Number of Veterans

21,755

Male Veterans

1,428

Female Veterans

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Polk County, Iowa Veterans by War

count

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Polk County, Iowa Veterans by Age

count

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Polk County, Iowa Veterans by Race

Polk County, Iowa Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

6.85%

Veteran Poverty Rate

26.96%

Veteran Disability Rate

Polk County, Iowa Veterans by Education

LaborForceParticipation

71.7%

Labor Force Participation

68.2%

Employment Rate

4.6%

Unemployment Rate

Polk County, Iowa Employment by Age

LaborForceParticipation

Polk County, Iowa Employment by Race

LaborForceParticipation

Polk County, Iowa Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

67.23%

Born in Polk County, Iowa

89.62%

Native Born

8.96%

Foreign Born

4.98%

Non Citizen

3.98%

Naturalized

Place of Birth

89.62% of Polk County, Iowa residents were born in the United States, with 67.23% having been born in Iowa. 4.98% 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

Sources