householder with no husband present, and 29.80% were non-families. 23.50% of all households were made up of individuals, and 7.50% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 2.94. According to the 2010 census, the population was spread out, with 24.70% under the age of 18, 9.60% from 18 to 24, 31.10% from 25 to 44, 22.40% from 45 to 64, and 12.10% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 102.20 males. For every 100 females age 18 and over, there were 101.50 males. In 2015, the median income for a household in the county was $55,880. The per capita income for the county was $28,902. 11.3% of the population were below the poverty line. Education The county's public schools come under the Okaloosa County School District. Northwest Florida State College serves over 10,000 residents of Okaloosa County annually for bachelor's degrees, associate degrees, and certificates. The college maintains four campuses in Okaloosa County: Niceville, Crestview, Ft. Walton Beach, and Hurlburt Field, and one campus in Walton County, FL. Libraries Okaloosa County is served by the Okaloosa County Public Library Cooperative. Formed in October 1997, the Cooperative originally included the county and the cities of Crestview, Mary Esther, and Niceville. The cities of Fort Walton Beach, Valparaiso, and Destin all joined the Cooperative by the year 2000. The Okaloosa County Public Library Cooperative is governed by an independent inter-governmental agency with seven members. Transportation Airports Bob Sikes Airport Destin–Fort Walton Beach Highways Interstate 10 US Highway 90 US Highway 98 Florida State Road 4 Florida State Road 85 Florida State Road 188 Florida State Road 189 Florida State Road 293 Florida State Road 393 Florida State Road 397 Surface transportation Emerald Coast Rider (formerly Okaloosa County Transit) operates bus services in the county. Politics Okaloosa County is one of the most conservative counties in Florida. Incumbent George W. Bush won the county in 2004 with 78% of the popular vote and in 2008 the Republican candidate John McCain polled 72%. Mitt Romney won the county in 2012 with 73.86% (69,785) of the popular vote, while Donald Trump won 70.42% (71,893) in 2016. Communities Cities Crestview Destin Fort Walton Beach Laurel Hill Mary Esther Niceville Valparaiso Towns Cinco Bayou Shalimar Census-designated places