Douglas County Voter Rgstrtn 301 Wilcox St Castle Rock, CO 80104 Phone : (303) 660-7444 Business Category Government Offices-County Legislative Bodies Douglas County Government--clerk & Recorder, Elections Division Castle Rock, CO 80104 Phone : (303) 660-7444 Business Category Government Offices-County Government Offices & Public Schools Douglas County Election 301 Wilcox St Castle Rock, CO 80104 Phone : (303) 660-7444 Business Category Government Offices-County Legislative Bodies Government Offices & Public Schools