O'Brien County
- Population
- 14,126
- Area
- 573.03 sq mi (1,484.15 km²), 0.17 sq mi water
- Median age
- 39.5
- Households
- 5,809
- Persons per household
- 2.4
- Median household income
- $68,356
- Median house value
- $173,100
Demographics: 2020–2024 ACS
Today
63°F
Partly Sunny3% precip
Tonight
53°F
Mostly Cloudy then Chance Rain Showers42% precip
Thursday
61°F
Rain Showers78% precip
Thursday Night
54°F
Rain Showers Likely60% precip