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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'BrienCounty15,44415,09614,398
USA [United States of America]Federal Republic248,709,873281,421,906308,758,105

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

Explanation: 2010 and 2018 population figures refer to entities in the boundaries of 2018.


Further information about the population structure:

Gender (E 2017)
Males6,914
Females6,887
Age Groups (E 2017)
0-14 years2,693
15-64 years8,257
65+ years2,851
Age Distribution (E 2017)
0-9 years1,758
10-19 years1,766
20-29 years1,507
30-39 years1,538
40-49 years1,459
50-59 years1,885
60-69 years1,798
70-79 years1,042
80+ years1,048
»Race« (E 2017)
White13,334
Black/African American163
Indigenous45
Asian119
Pacific Islander3
2 or more137
Ethnicity (E 2017)
Hispanic or Latino662
Other13,139