O Brien is located in Florida. O Brien, Florida has a population of 3,172. O Brien is more family-centric than the surrounding county with 45.49% of the households containing married families with children. The county average for households married with children is 24.61%.
The median household income in O Brien, Florida is $45,823. The median household income for the surrounding county is $40,600 compared to the national median of $57,652. The median age of people living in O Brien is 35.3 years.
The average high temperature in July is 92 degrees, with an average low temperature in January of 39.6 degrees. The average rainfall is approximately 54.1 inches per year, with 0 inches of snow per year.
