Demographic Characteristics of O'Brien County, Iowa
Total Population: 15,102
O'Brien County, Iowa Age/Gender Statistics
 Male Population: 7,390 (48.93%) |
 Female Population: 7,712 (51.07%) |
||
| Under 5 years | 889 | 45 to 54 years: | 1,944 |
| 5 to 9 years: | 964 | 55 to 59 years: | 693 |
| 10 to 14 years: | 1,123 | 60 to 64 years: | 702 |
| 15 to 19 years: | 1,198 | 65 to 74 years: | 1,471 |
| 20 to 24 years: | 753 | 75 to 84 years: | 1,154 |
| 25 to 34 years: | 1,457 | 85 years and over: | 566 |
| 35 to 44 years: | 2,188 | ||
| Median Age: 40.7 | |||
O'Brien County, Iowa Racial Statistics
One Race
15,033
White
14,807
Black or African American
52
American Indian and Alaska Native
25
Asian
77
Asian Indian
18
Chinese
9
Filipino
9
Japanese
4
Korean
22
Vietnamese
2
Other Asian
13
Native Hawaiian and Other Pacific Islander
1
Native Hawaiian
0
Guamanian or Chamorro
0
Samoan
1
Other Pacific Islander
0
Some other race
71
Two or more races
69
O'Brien County, Iowa Hispanic Population Statistics
| Total Hispanic or Latino Population: 267 | |||
| Mexican | Puerto Rican | Cuban | Other |
| 217 | 0 | 0 | 50 |
O'Brien County, Iowa Relationship Statistics
| In households: 14,511 (96.09%) | In group quarters: 591 (3.91%) | ||
| Householder | 6,001 | Institutionalized | 553 |
| Spouse | 3,661 | Noninstitutionalized | 38 |
| Child | 4,260 | ||
| Own child under 18 years | 3,622 | ||
| Other relatives | 194 | ||
| Under 18 years | 70 | ||
| Nonrelatives | 395 | ||
| Unmarried partner | 169 | ||