 The average household size was 2.68 and the average family size was 3.24.In the county, the population was spread out with 31.80% under the age of 18, 8.60% from 18 to 24, 28.80% from 25 to 44, 20.60% from 45 to 64, and 10.30% who were 65 years of age or older.The median age was 31 years.