The current tax bill can be obtained from the Cook County Treasurer’s Office. Tax bills for previous years are handled by the Cook County Clerk’s Office. The Treasurer’s phone number is (312) 443-5100 and the County Clerk’s phone number is (312) 603-5656. To receive a duplicate of the current tax bill by mail, you may also visit the Treasurer’s Web site at www.cookcountytreasurer.com.