O Brien is located in Florida. O Brien, Florida has population of 4,261. O Brien is more family-centric than the surrounding county with 29% of the households with children.
The median household income in O Brien, Florida is $43,572. The median household income for the surrounding county is $49,953 compared to the national median of $66,222. The median age of people living in O Brien is 47.7 years.
The average high temperature in July is 91.86 degrees, with an average low temperature in January of 41.46 degrees. The annual precipitation is 54.26.
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