Marion County, Iowa Population 2024

34,038

Marion County, Iowa's estimated 2024 population is 34,038 with a growth rate of 0.59% in the past year according to the most recent United States census data. Marion County, Iowa is the 21st largest county in Iowa. The 2010 population was 33,225 and has seen a growth of 2.45% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202935,0281980.57%
202834,8301980.57%
202734,6321980.58%
202634,4341980.58%
202534,2361980.58%
202434,0381980.59%
202333,8401980.59%
202233,6421980.59%
202133,444360.11%
202033,4081280.38%
201933,280290.09%
201833,2511440.43%
201733,107-50-0.15%
201633,157340.1%
201533,123-157-0.47%
201433,2802610.79%
201333,019-258-0.78%
201233,27730.01%
201133,274490.15%
201033,225
199030,0013321.12%
198029,6693,31712.59%
197026,3524661.8%
196025,886-44-0.17%
195025,930-1,089-4.03%
194027,0191,2925.02%
193025,7277703.09%
192024,9571,9628.53%
191022,995-1,164-4.82%
190024,1591,1014.77%
189023,058-2,053-8.18%
188025,1116752.76%
187024,4367,62345.34%
186016,81311,331206.69%
18505,482-29,546-84.35%
showing: 35 rows
2024 Growth Rate
0.59% (198)
County Website
Marion County
State
Iowa
County Seat
2010 Population
33,225
Area
555 mi²
Density
61 people/mi²
Growth Since 2010
2.45% (813)
Founded
1845

Marion County, Iowa Population 2024

Population by Race

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Race
Population
Percentage (of total)
White31,77494.88%
Two or more races9472.83%
Asian3351%
Other race2020.6%
Black or African American1870.56%
Native American320.1%
Native Hawaiian or Pacific Islander100.03%
showing: 7 rows

White

Two or more races

Asian

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Marion County, Iowa Population by Race

Marion County, Iowa Population Pyramid 2024

Marion County, Iowa Median Age

39.8

Total

38.8

Male

41.1

Female

Marion County, Iowa Adults

There are 25,686 adults, (6,257 of whom are seniors) in Marion County, Iowa.

Marion County, Iowa Age Dependency

72.4

Age Dependency Ratio

32.2

Old Age Dependency Ratio

40.2

Child Dependency Ratio

Marion County, Iowa Sex Ratio

Female16,73249.97%
Male16,75550.03%

Marion County, Iowa Population by Age

Marion County, Iowa Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All13,3102.3977.122.9
Married7,8842.8889.510.5
Non Family4,0501.2456.543.5
Female8642.8662.237.8
Male5123.17426
showing: 5 rows

2.84

Average Family Size

2.39

Average Household Size

77.1%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Marion 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

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

Marion 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 black people with a rate of 100%.

The highest rate of bachelors degrees is among islander people with a rate of 100%.

Marion County, Iowa Educational Attainment by Race

All

Male

Female

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$50,641

Average Earnings

$59,809

Average Male

$40,033

Average Female

Marion County, Iowa Earnings by Educational Attainment

Marion County, Iowa Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Marion County, Iowa Language

97% of Marion County, Iowa residents speak only English, while 3% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.49% of the population.

Marion County, Iowa Language

Marion County, Iowa Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White29,8592,2407.5%
Asian3197523.51%
Multiple884343.85%
Hispanic586325.46%
Native322475%
Black1702011.76%
Other1401611.43%
showing: 7 rows

7.69%

Overall Poverty Rate

6.26%

Male Poverty Rate

9.1%

Female Poverty Rate

Poverty in Marion County, Iowa

The race most likely to be in poverty in Marion County, Iowa is Native, with 75% below the poverty level.

The race least likely to be in poverty in Marion County, Iowa is Multiple, with 3.85% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.53%. Among those working part-time, it was 13.27%, and for those that did not work, the poverty rate was 13.06%.

Marion County, Iowa Poverty

rate

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Rate
Poverty
Less Than 9th Grade18.47%
High School11%
Some College6.75%
Bachelors or Greater1.21%
showing: 4 rows

Marion County, Iowa Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed54.61%
Male Unemployed53.68%
Female Employed6.78%
Male Employed2.45%
showing: 4 rows

Marion County, Iowa Poverty Rate by Employment Status and Sex

Marion County, Iowa Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Marion County, Iowa Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

58.6%

Overall Marriage Rate

61.6%

Male Marriage Rate

55.7%

Female Marriage Rate

Marion County, Iowa Married by Age and Sex

male

female

Marion 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 45-54.

Marion County, Iowa Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Marion County, Iowa Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,905

Number of Veterans

1,775

Male Veterans

130

Female Veterans

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Marion County, Iowa Veterans by War

count

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Marion County, Iowa Veterans by Age

count

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Marion County, Iowa Veterans by Race

Marion County, Iowa Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

6.59%

Veteran Poverty Rate

39.82%

Veteran Disability Rate

Marion County, Iowa Veterans by Education

LaborForceParticipation

64.9%

Labor Force Participation

63.2%

Employment Rate

2.3%

Unemployment Rate

Marion County, Iowa Employment by Age

LaborForceParticipation

Marion County, Iowa Employment by Race

LaborForceParticipation

Marion 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

74.93%

Born in Marion County, Iowa

98.14%

Native Born

1.86%

Foreign Born

0.75%

Non Citizen

1.11%

Naturalized

Place of Birth

98.14% of Marion County, Iowa residents were born in the United States, with 74.93% having been born in Iowa. 0.75% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Marion County, Iowa Place of Birth

Sources