O'Brien County, Iowa's estimated 2024 population is 13,939 with a growth rate of -0.52% in the past year according to the most recent United States census data. O'Brien County, Iowa is the 57th largest county in Iowa. The 2010 population was 14,405 and has seen a growth of -3.23% since that time.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 13,574 | -73 | -0.53% |
| 2028 | 13,647 | -73 | -0.53% |
| 2027 | 13,720 | -73 | -0.53% |
| 2026 | 13,793 | -73 | -0.53% |
| 2025 | 13,866 | -73 | -0.52% |
| 2024 | 13,939 | -73 | -0.52% |
| 2023 | 14,012 | -73 | -0.52% |
| 2022 | 14,085 | 41 | 0.29% |
| 2021 | 14,044 | -106 | -0.75% |
| 2020 | 14,150 | 354 | 2.57% |
| 2019 | 13,796 | -10 | -0.07% |
| 2018 | 13,806 | 29 | 0.21% |
| 2017 | 13,777 | -144 | -1.03% |
| 2016 | 13,921 | -6 | -0.04% |
| 2015 | 13,927 | -118 | -0.84% |
| 2014 | 14,045 | -1 | -0.01% |
| 2013 | 14,046 | -108 | -0.76% |
| 2012 | 14,154 | -63 | -0.44% |
| 2011 | 14,217 | -188 | -1.31% |
| 2010 | 14,405 | 0 | 0% |
| 1990 | 15,444 | -1,528 | -9% |
| 1980 | 16,972 | -550 | -3.14% |
| 1970 | 17,522 | -1,318 | -7% |
| 1960 | 18,840 | -130 | -0.69% |
| 1950 | 18,970 | -323 | -1.67% |
| 1940 | 19,293 | 884 | 4.8% |
| 1930 | 18,409 | -642 | -3.37% |
| 1920 | 19,051 | 1,789 | 10.36% |
| 1910 | 17,262 | 277 | 1.63% |
| 1900 | 16,985 | 3,925 | 30.05% |
| 1890 | 13,060 | 8,905 | 214.32% |
| 1880 | 4,155 | 3,440 | 481.12% |
| 1870 | 715 | 707 | 8837.5% |
| 1860 | 8 | -13,566 | -99.94% |
White
Two or more races
Other race
Black or African American
Asian
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 5,700 | 2.41 | 76 | 24 |
| Married | 3,061 | 3.03 | 90.9 | 9.1 |
| Non Family | 2,122 | 1.27 | 55.5 | 44.5 |
| Female | 286 | 3.63 | 60.1 | 39.9 |
| Male | 231 | 3.18 | 86.6 | 13.4 |
3.03
Average Family Size
2.41
Average Household Size
76.0%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
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%.
All
Male
Female
$43,839
Average Earnings
$52,656
Average Male
$29,802
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
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.
rate
12.14%
Overall Poverty Rate
11.2%
Male Poverty Rate
13.07%
Female Poverty Rate
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%.
Married
Widowed
Divorced
Separated
NeverMarried
55.4%
Overall Marriage Rate
56.3%
Male Marriage Rate
54.4%
Female Marriage Rate
male
female
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.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
5.49%
Veteran Poverty Rate
34.32%
Veteran Disability Rate
LaborForceParticipation
64%
Labor Force Participation
62.4%
Employment Rate
2.4%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
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.
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
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.