Post Offices
Post Offices in & near Knowlton, Iowa. Operating hours, locations, phone/fax number, services information.
Diagonal Post Office
Post Office in Diagonal, Iowa on Broadway St. Operating hours, phone number, services information, and other locations.
Address: 221 Broadway St, Diagonal, IA 50845
Phone: 641-734-5765
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
Retail Hours
Monday 8:00am - 12:00pmTuesday 8:00am - 12:00pm
Wednesday 8:00am - 12:00pm
Thursday 8:00am - 12:00pm
Friday 8:00am - 12:00pm
Saturday 8:00am - 8:30am
Sunday Closed
Lobby Hours
Monday 4:00pmTuesday 4:00pm
Wednesday 4:00pm
Thursday 4:00pm
Friday 4:00pm
Saturday 4:00pm
Sunday Closed
Last Collection Times
Monday 9:00am - 11:00amTuesday 9:00am - 11:00am
Wednesday 9:00am - 11:00am
Thursday 9:00am - 11:00am
Friday 9:00am - 11:00am
Saturday Closed
Sunday Closed