 The average household size was 2.53 and the average family size was 3.15.The county population contained 28.20% under the age of 18, 11.60% from 18 to 24, 26.00% from 25 to 44, 21.40% from 45 to 64, and 12.80% who were 65 years of age or older.The median age was 34 years.