 The average household size was 2.77 and the average family size was 3.19.The county population contained 29.40% under the age of 18, 6.80% from 18 to 24, 32.90% from 25 to 44, 23.20% from 45 to 64, and 7.60% who were 65 years of age or older.The median age was 35 years.