Contact Us City of Colby Clark / Marathon County, Wisconsin 211 W Spence Street, PO Box 236 Colby, WI 54421 Phone: (715) 223-4435 Fax: (715) 223-8835 <a href="http://www.emailmeform.com/builder/embed/Vq0zX0lD2cf87">Fill out form.</a>