In the county, the population was spread out with 24.70% under the age of 18, 9.70% from 18 to 24, 29.00% from 25 to 44, 22.90% from 45 to 64, and 13.70% who were 65 years of age or older.
As of the 2010 United States Census, there were 535,153 people, 223,943 households, and 138,060 families residing in the county [REF].