O'Brien
County in Iowa
County
The population development of O'Brien.
| Name | Status | Population Census 1990-04-01 | Population Census 2000-04-01 | Population Census 2010-04-01 | Population Census 2020-04-01 | Population Estimate 2024-07-01 | |
|---|---|---|---|---|---|---|---|
| O'Brien | County | 15,444 | 15,102 | 14,398 | 14,180 | 14,260 | → |
| Iowa | State | 2,776,755 | 2,926,324 | 3,046,355 | 3,190,546 | 3,241,488 |
Contents: Incorporated Places
The population development of the incorporated places in O'Brien.
icon links to further information about a selected place including its population structure (gender, age groups, age distribution, urbanization, »race«, ethnicity).| Name | Status | County | Population Census 1990-04-01 | Population Census 2000-04-01 | Population Census 2010-04-01 | Population Census 2020-04-01 | Population Estimate 2024-07-01 | |
|---|---|---|---|---|---|---|---|---|
| Archer | City | O'Brien | 145 | 126 | 131 | 116 | 116 | → |
| Calumet | City | O'Brien | 160 | 182 | 170 | 146 | 144 | → |
| Hartley | City | O'Brien | 1,653 | 1,738 | 1,672 | 1,604 | 1,584 | → |
| Paullina | City | O'Brien | 1,149 | 1,092 | 1,052 | 979 | 979 | → |
| Primghar | City | O'Brien | 955 | 891 | 909 | 905 | 893 | → |
| Sanborn | City | O'Brien | 1,345 | 1,349 | 1,404 | 1,392 | 1,463 | → |
| Sheldon | City | O'Brien / Sioux | 4,937 | 5,019 | 5,196 | 5,514 | 5,584 | → |
| Sutherland | City | O'Brien | 729 | 707 | 649 | 630 | 628 | → |
Source: U.S. Census Bureau.
Explanation: Latest available rebased population figures are used. In case of significant changes, they were recalculated by using census block data.