The Cos Cob Post Office branch at 152 East Putnam Avenue closed temporarily for business on Friday, Aug 7, according to a press release from the US Postal Service. Effective Saturday, August 8, 2026, retail services will be offered at the Downtown Greenwich Post Office during the closure. • Downtown Greenwich44 Amogerone CrosswayGreenwich, CT 06830Retail Window HoursWindow Service M-F 9:00 AM – 5:30 PMSaturday 9:00 AM – 12:30 PMSunday ClosedDrop shipments will be accepted at the Greenwich• Greenwich Post Office29 Valley DrGreenwich, CT 06831Drop Shipment HoursDrop Ship Monday – Saturday 8:15 AM – 3:00 PM“We apologize for this inconvenience to our customers and plan to have the COS COB Post Office reopened and fully operational as soon as possible,” the postal service said in their release.