Mahaska County, Iowa Population 2024

21,777

Mahaska County, Iowa's estimated 2024 population is 21,777 with a growth rate of -0.44% in the past year according to the most recent United States census data. Mahaska County, Iowa is the 28th largest county in Iowa. The 2010 population was 22,409 and has seen a growth of -2.82% since that time.

Note: data after 2022 is projected based on recent change

35 Rows

Year
Population
Growth
Change
202921,292-97-0.45%
202821,389-97-0.45%
202721,486-97-0.45%
202621,583-97-0.45%
202521,680-97-0.45%
202421,777-97-0.44%
202321,874-97-0.44%
202221,971-3-0.01%
202121,974-186-0.84%
202022,160-269-1.2%
201922,4292261.02%
201822,203-219-0.98%
201722,422970.43%
201622,325-92-0.41%
201522,417-49-0.22%
201422,466340.15%
201322,432250.11%
201222,407-99-0.44%
201122,506970.43%
201022,40900%
199021,522-1,345-5.88%
198022,8676903.11%
197022,177-1,425-6.04%
196023,602-1,070-4.34%
195024,672-1,813-6.85%
194026,4856812.64%
193025,804-466-1.77%
192026,270-3,590-12.02%
191029,860-4,413-12.88%
190034,2735,46818.98%
189028,8053,60314.3%
188025,2022,69411.97%
187022,5087,69251.92%
186014,8168,827147.39%
18505,989-15,303-71.87%
2024 Growth Rate
-0.44% (-97)
County Website
Mahaska County
State
Iowa
County Seat
Oskaloosa
2020 Population
22,160
Area
571 mi²
Density
38 people/mi²
Growth Since 2020
-1.73% (-383)
Founded
1843

Population by Race

Race
Population
Percentage (of total)
White20,65793.64%
Two or more races6723.05%
Black or African American3771.71%
Asian2241.02%
Other race1040.47%
Native American240.11%
Native Hawaiian or Pacific Islander10%

White

Two or more races

Black or African American

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Mahaska County, Iowa Population by Race

Mahaska County, Iowa Population Pyramid 2024

Mahaska County, Iowa Median Age

39.6

Total

38.3

Male

40.5

Female

Mahaska County, Iowa Adults

There are 16,811 adults, (4,189 of whom are seniors) in Mahaska County, Iowa.

Mahaska County, Iowa Age Dependency

74.8

Age Dependency Ratio

33.2

Old Age Dependency Ratio

41.6

Child Dependency Ratio

Mahaska County, Iowa Sex Ratio

Female10,85749.22%
Male11,20250.78%

Mahaska County, Iowa Population by Age

Mahaska County, Iowa Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All8,8732.4167.732.3
Married4,5053.0183.216.8
Non Family3,0781.2452.147.9
Female9283.1645.854.2
Male3622.9163.836.2

2.93

Average Family Size

2.41

Average Household Size

67.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Mahaska County, Iowa Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade6504.42%
Associates Degree1,73911.82%
Bachelors Degree2,46216.73%
Graduate Degree8325.65%
High School Graduate5,63038.26%
Less Than 9th Grade3512.39%
Some College3,05220.74%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

Mahaska County, Iowa Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White13,93213,0573,143
Black25817011
Hispanic20920011
2+ Races20520145
Asian14812364
Other Race444312
Native American888

The highest rate of high school graduation is among native american people with a rate of 100%.

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

Mahaska County, Iowa Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$50,456$61,750$45,945
Graduate Degree$67,254$74,722$66,926
High School Graduate$36,635$47,982$26,460
Less Than 9th Grade$21,932$24,643$0
Overall$43,378$51,526$33,750
Some College$41,557$52,059$30,150

$43,378

Average Earnings

$51,526

Average Male

$33,750

Average Female

Mahaska County, Iowa Earnings by Educational Attainment

Mahaska County, Iowa Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Mahaska County, Iowa Language

97.77% of Mahaska County, Iowa residents speak only English, while 2.23% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.19% of the population.

Mahaska County, Iowa Language

Mahaska County, Iowa Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White19,7982,29011.57%
Black30511738.36%
Multiple6538813.48%
Hispanic4805411.25%
Native241666.67%
Other10066%
Asian22431.34%

11.97%

Overall Poverty Rate

10.33%

Male Poverty Rate

13.65%

Female Poverty Rate

Poverty in Mahaska County, Iowa

The race most likely to be in poverty in Mahaska County, Iowa is Native, with 66.67% below the poverty level.

The race least likely to be in poverty in Mahaska County, Iowa is Asian, with 1.34% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.61%. Among those working part-time, it was 21.58%, and for those that did not work, the poverty rate was 16.65%.

Mahaska County, Iowa Poverty

rate

Rate
Poverty
Less Than 9th Grade26.45%
High School12.88%
Some College7.39%
Bachelors or Greater3.84%

Mahaska County, Iowa Poverty Rate by Education

rate

Rate
Poverty
Female Unemployed49.4%
Male Unemployed47.3%
Female Employed9.26%
Male Employed8.08%

Mahaska County, Iowa Poverty Rate by Employment Status and Sex

Mahaska County, Iowa Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$81,257$97,711
Households$65,200$81,121
Married Families$90,534$-999,999,999
Non Families$35,975$44,974

mean

median

Income by Household Type

Mahaska County, Iowa Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

52.4%

Overall Marriage Rate

52.3%

Male Marriage Rate

52.5%

Female Marriage Rate

Mahaska County, Iowa Married by Age and Sex

male

female

Mahaska County, Iowa Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.

Mahaska County, Iowa Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Mahaska County, Iowa Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

933

Number of Veterans

910

Male Veterans

23

Female Veterans

War
Veterans
Vietnam331
First Gulf War182
Second Gulf War158
Korea74
World War II54

Mahaska County, Iowa Veterans by War

count

Age Group
Veterans
75+313
65 to 74218
55 to 64181
35 to 54168
18 to 3453

Mahaska County, Iowa Veterans by Age

count

Name
Veterans
% of Total
White9140.057433706170667335
Hispanic240.06837606837606838
2+ Races130.05241935483870968
Asian60.030927835051546393

Mahaska County, Iowa Veterans by Race

Mahaska County, Iowa Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

5.09%

Veteran Poverty Rate

32.99%

Veteran Disability Rate

Mahaska County, Iowa Veterans by Education

LaborForceParticipation

65.8%

Labor Force Participation

63.6%

Employment Rate

3.3%

Unemployment Rate

Mahaska County, Iowa Employment by Age

LaborForceParticipation

Mahaska County, Iowa Employment by Race

LaborForceParticipation

Mahaska 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

78.99%

Born in Mahaska County, Iowa

98.32%

Native Born

1.68%

Foreign Born

0.82%

Non Citizen

0.86%

Naturalized

Place of Birth

98.32% of Mahaska County, Iowa residents were born in the United States, with 78.99% having been born in Iowa. 0.82% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Mahaska County, Iowa Place of Birth

Sources