 The average household size was 2.79 and the average family size was 3.38.In the county, the population was distributed as 29.00% under the age of 18, 10.3% from 18 to 24, 33.4% from 25 to 44, 19.8% from 45 to 64, and 7.4% who were 65 years of age or older.The median age was 31 years.