Highland city is located in Polk county Florida with a geographic area of 7.8 square miles. The total population in Highland city is 11,392 with 49.2% male and 50.8% female. Children under age 5 represent 7.1% of the population, under age 18 equal 25.0% of the population and over age 65 is 11.7% of the population. The median household income is $68,555, per capita income is $27,546. There are a total of 3,649 housing units with 80.7% owner occupied. Education includes 30.5% of residents that are high school graduates and 29.4% with a bachelor's degree or higher. The average temperature in Highland city in the summer is 80 degrees, and in the winter 56 degrees.