 28.80% of the county's population was under age 18, 6.60% was from age 18 to 24, 31.70% was from age 25 to 44, 24.60% was from age 45 to 64, and 8.30% was age 65 or older.The median age was 36 years.For every 100 females, there were 102.10 males.