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O'Brien

County in Iowa (USA)

Contents: Population

The population development of O'Brien as well as related information and services (Wikipedia, Google, images).

O'BrienCounty15,44415,10214,39814,18214,015
USA [United States of America]Federal Republic248,709,873281,421,906308,745,538331,449,281331,893,745

Source: U.S. Census Bureau (web).

Explanation: All population totals refer to 2020 boundaries.


Further information about the population structure:

Gender (E 2019)
Males6,898
Females6,855
Age Groups (E 2019)
0-14 years2,743
15-64 years8,170
65+ years2,840
Age Distribution (E 2019)
0-9 years1,760
10-19 years1,844
20-29 years1,551
30-39 years1,542
40-49 years1,446
50-59 years1,752
60-69 years1,843
70-79 years1,045
80+ years970
»Race« (C 2020)
White12,825
Black/African American161
Indigenous80
Asian80
Pacific Islander11
Some other376
2 or more649
Ethnicity (C 2020)
Hispanic or Latino985
Other13,197

See also:

Located in:


USA: Counties