The first half or full payments of Real Estate taxes are due by Jan. 31 at the City Clerks Office.  FULL payments of Personal Property taxes are due by Jan. 31.  Taxes are to be paid at or mailed to the Colby City Treasurer, PO Box 236, Colby WI  54421.  Make checks payable to: Colby City Treasurer.  The second half of balance is due on July 31 and must go to the Clark County Treasurer or the Marathon County Treasurer depending on which county you live in.