Post Office Changes   Old/New Finance No. ZIP Code State P.O. Name County/Parish Station/Branch/Unit Unit Type Effective Date Comments Old 16-1542 60611 IL Chicago Cook Ontario Street Classified Station     New 16-1542 60611 IL Chicago Cook Streeterville Classified Station 07/15/2017 This announcement changes the name of the Ontario Street, IL Post Office to the Streeterville, IL Post Office. Continue to use Chicago, IL 60611 as last line of address. Old 30-8745 68954 NE Sutton Clay Inland Place Name     New 30-8745 68954 NE Harvard Clay Inland Place Name 07/01/2017 This announcement changes the administrative office for this ZIP Code™ from Sutton, NE to Harvard, NE. Continue to use Inland, NE 68954 as last line for both addresses. — Address Management, Addressing and Geospatial Technology, 10-12-17