 The average household size was 2.70 and the average family size was 3.12.In the county, the population was spread out with 27.80% under the age of 18, 8.20% from 18 to 24, 31.70% from 25 to 44, 22.70% from 45 to 64, and 9.60% who were 65 years of age or older.The median age was 35 years.