O'Brien County, Iowa Population 2024

14,056

O'Brien County, Iowa's estimated 2024 population is 14,056 with a growth rate of -0.01% in the past year according to the most recent United States census data. O'Brien County, Iowa is the 56th largest county in Iowa. The 2010 population was 14,405 and has seen a growth of -2.42% since that time.

Note: data after 2022 is projected based on recent change

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Year
Population
Growth
Growth Rate
202914,046-2-0.01%
202814,048-2-0.01%
202714,050-2-0.01%
202614,052-2-0.01%
202514,054-2-0.01%
202414,056-2-0.01%
202314,058-2-0.01%
202214,060-2-0.01%
202114,062-92-0.65%
202014,1543582.59%
201913,796-10-0.07%
201813,806290.21%
201713,777-144-1.03%
201613,921-6-0.04%
201513,927-118-0.84%
201414,045-1-0.01%
201314,046-108-0.76%
201214,154-63-0.44%
201114,217-188-1.31%
201014,405
199015,444-1,528-9%
198016,972-550-3.14%
197017,522-1,318-7%
196018,840-130-0.69%
195018,970-323-1.67%
194019,2938844.8%
193018,409-642-3.37%
192019,0511,78910.36%
191017,2622771.63%
190016,9853,92530.05%
189013,0608,905214.32%
18804,1553,440481.12%
18707157078837.5%
18608-14,038-99.94%
showing: 34 rows
2024 Growth Rate
-0.01% (-2)
County Website
O'Brien County
State
Iowa
County Seat
2010 Population
14,405
Area
573 mi²
Density
25 people/mi²
Growth Since 2010
-2.42% (-349)
Founded
1851

O'Brien County, Iowa Population 2024

Population by Race

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Race
Population
Percentage (of total)
White12,93391.48%
Two or more races6434.55%
Other race2311.63%
Black or African American1971.39%
Asian980.69%
Native American360.25%
Native Hawaiian or Pacific Islander
showing: 7 rows

White

Two or more races

Other race

Black or African American

Asian

Native American

Native Hawaiian or Pacific Islander

O'Brien County, Iowa Population by Race

O'Brien County, Iowa Population Pyramid 2024

O'Brien County, Iowa Median Age

40.4

Total

39.3

Male

41.6

Female

O'Brien County, Iowa Adults

There are 10,773 adults, (3,037 of whom are seniors) in O'Brien County, Iowa.

O'Brien County, Iowa Age Dependency

82.8

Age Dependency Ratio

39.3

Old Age Dependency Ratio

43.5

Child Dependency Ratio

O'Brien County, Iowa Sex Ratio

Female7,13150.44%
Male7,00749.56%

O'Brien County, Iowa Population by Age

O'Brien County, Iowa Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All5,7002.417624
Married3,0613.0390.99.1
Non Family2,1221.2755.544.5
Female2863.6360.139.9
Male2313.1886.613.4
showing: 5 rows

3.03

Average Family Size

2.41

Average Household Size

76.0%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

O'Brien County, Iowa Households and Families

Male

Female

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

O'Brien County, Iowa Educational Attainment by Sex (over 25)

O'Brien County, Iowa Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

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

The highest rate of bachelors degrees is among black people with a rate of 29.2%.

O'Brien County, Iowa Educational Attainment by Race

All

Male

Female

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

$43,839

Average Earnings

$52,656

Average Male

$29,802

Average Female

O'Brien County, Iowa Earnings by Educational Attainment

O'Brien County, Iowa Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

O'Brien County, Iowa Language

94.34% of O'Brien County, Iowa residents speak only English, while 5.66% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 3.59% of the population.

O'Brien County, Iowa Language

O'Brien County, Iowa Poverty by Race

rate

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Name
Total
In Poverty
Poverty Rate
White12,5171,29310.33%
Hispanic81321226.08%
Black19615679.59%
Other23115265.8%
Multiple6436610.26%
Native3612.78%
showing: 6 rows

12.14%

Overall Poverty Rate

11.2%

Male Poverty Rate

13.07%

Female Poverty Rate

Poverty in O'Brien County, Iowa

The race most likely to be in poverty in O'Brien County, Iowa is Black, with 79.59% below the poverty level.

The race least likely to be in poverty in O'Brien County, Iowa is Native, with 2.78% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.65%. Among those working part-time, it was 16.36%, and for those that did not work, the poverty rate was 21.88%.

O'Brien County, Iowa Poverty

rate

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Rate
Poverty
Less Than 9th Grade16.57%
High School15.26%
Some College6.66%
Bachelors or Greater6.35%
showing: 4 rows

O'Brien County, Iowa Poverty Rate by Education

rate

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

Rate
Poverty
Male Unemployed16.84%
Female Employed8.23%
Male Employed5.38%
Female Unemployed1.3%
showing: 4 rows

O'Brien County, Iowa Poverty Rate by Employment Status and Sex

O'Brien County, Iowa Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

mean

median

Income by Household Type

O'Brien County, Iowa Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

55.4%

Overall Marriage Rate

56.3%

Male Marriage Rate

54.4%

Female Marriage Rate

O'Brien County, Iowa Married by Age and Sex

male

female

O'Brien 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.

O'Brien County, Iowa Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

O'Brien County, Iowa Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

724

Number of Veterans

700

Male Veterans

24

Female Veterans

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

O'Brien County, Iowa Veterans by War

count

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

O'Brien County, Iowa Veterans by Age

count

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

O'Brien County, Iowa Veterans by Race

O'Brien County, Iowa Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

5.49%

Veteran Poverty Rate

34.32%

Veteran Disability Rate

O'Brien County, Iowa Veterans by Education

LaborForceParticipation

64%

Labor Force Participation

62.4%

Employment Rate

2.4%

Unemployment Rate

O'Brien County, Iowa Employment by Age

LaborForceParticipation

O'Brien County, Iowa Employment by Race

LaborForceParticipation

O'Brien 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

78.76%

Born in O'Brien County, Iowa

96.47%

Native Born

3.53%

Foreign Born

2.19%

Non Citizen

1.34%

Naturalized

Place of Birth

96.47% of O'Brien County, Iowa residents were born in the United States, with 78.76% having been born in Iowa. 2.19% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

O'Brien County, Iowa Place of Birth

Sources