 The average household size was 2.71 and the average family size was 3.10.In the county, the population was spread out with 28.00% under the age of 18, 8.20% from 18 to 24, 30.70% from 25 to 44, 23.50% from 45 to 64, and 9.50% who were 65 years of age or older.The median age was 35 years.