 The average household size was 2.69 and the average family size was 3.20.The county population contained 28.10% under the age of 18, 14.60% from 18 to 24, 27.20% from 25 to 44, 20.00% from 45 to 64, and 10.10% who were 65 years of age or older.The median age was 30 years.