 The average household size was 2.40 and the average family size was 3.00.The county population contained 23.50% under the age of 18, 15.40% from 18 to 24, 30.40% from 25 to 44, 20.30% from 45 to 64, and 10.40% who were 65 years of age or older.The median age was 32 years.