Usa-Places.com has listed approx 16 County government offices in Castle Rock. Some of the Top rated County government offices in Castle Rock are- Douglas County Motor Vehicle - LOBBY CLOSED TO THE PUBLIC. TRANSACTIONS ONLINE BY PHONE OR APPOINTMENT ONLY., Douglas County Building Division, Douglas County Recording Department, Douglas County Vehicle Registration, Douglas County Dog Control, Douglas County Public Works Engineering, Douglas County Treasurer, Douglas County Public Trustee, Douglas County Assessor & Douglas County Government office.