3600-block of West 79th Street.
The delayed mail, including letters and packages from those locations, total over 62,000 from last September through February.
Congressman Bobby Rush, who joined local aldermen and mayors from Alsip and Evergreen Park in a morning press conference, called it unacceptable.
"People who depend on the postal service, seniors, families, other people depending on the postal service day-in and day-out -- it's an absolute, epic, total, undeniable failure," Rush said.
He is calling for the postmaster to resign and for a management overhaul. The report he highlighted also revealed inaccurate reporting of the delayed mail. Some of that included "voter information" from the Secretary of State.