O'Brien, IA County is a lively and vibrant county with a population of 14,139 people. It has a population density of 24 people per square mile which is significantly lower than the US average 93 people per square mile. In O'Brien, IA County there are many local businesses to explore such as the O'Brien's Family Restaurant, The Green Thumb Bakery, and Thompson Appliance Repair Shop. Year-round outdoor activities available in the area include fishing at Big Dog Lake, biking on rural roads, camping at Johnson Park, and hiking on Lakeview Trails. Other organizations like the 4-H Club and Volunteer Fire Department provide community members with opportunities to get involved in local activities, while sporting events such as track meets and basketball tournaments keep everyone entertained.
The population in O'Brien County is 14,139. There are 25 people per square mile aka population density. The median age in O'Brien County is 40.7, the US median age is 38.4. The number of people per household in O'Brien County is 2.3, the US average of people per household is 2.6.
Family in O'Brien County
- 57.3% are married
- 8.0% are divorced
- 32.9% are married with children
- 8.5% have children, but are single
Race in O'Brien County
- 93.2% are White
- 0.7% are Black
- 0.9% are Asian
- 0.2% are Native American
- 0.0% claim Other
- 4.5% claim Hispanic ethnicity
- 0.6% Two or more races
- 0.0% Hawaiian, Pacific Islander