 The average household size was 2.84 and the average family size was 3.26.The county population contained 31.50% under the age of 18, 6.90% from 18 to 24, 34.70% from 25 to 44, 19.50% from 45 to 64, and 7.50% who were 65 years of age or older.The median age was 34 years.