 The average household size was 2.52 and the average family size was 3.07.In the county, the population was spread out, with 25.00% under the age of 18, 15.30% from 18 to 24, 30.20% from 25 to 44, 19.50% from 45 to 64, and 9.90% who were 65 years of age or older.The median age was 31 years.