As of the census[REF] of 2000, there were 18,643 people, 7,900 households, and 5,466 families residing in the county.
There were 7,900 households out of which 23.60% had children under the age of 18 living with them, 58.50% were married couples living together, 6.70% had a female householder with no husband present, and 30.80% were non-families.