Post Offices

Post Offices in & near Seneca, Illinois. Operating hours, locations, phone/fax number, services information.

Seneca Post Office

Post Office in Seneca, Illinois on E Armour St. Operating hours, phone number, services information, and other locations.

Address: 121 E Armour St, Seneca, IL 61360
Phone: 815-357-8393
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Retail Hours

Monday 9:00am - 12:30pm, 1:30pm - 4:30pm
Tuesday 9:00am - 12:30pm, 1:30pm - 4:30pm
Wednesday 9:00am - 12:30pm, 1:30pm - 4:30pm
Thursday 9:00am - 12:30pm, 1:30pm - 4:30pm
Friday 9:00am - 12:30pm, 1:30pm - 4:30pm
Saturday 9:00am - 11:00am
Sunday Closed

Lobby Hours

Monday 4:00pm
Tuesday 4:00pm
Wednesday 4:00pm
Thursday 4:00pm
Friday 4:00pm
Saturday 11:00am
Sunday Closed

Last Collection Times

Monday 9:00am - 12:30pm, 1:30pm - 3:00pm
Tuesday 9:00am - 12:30pm, 1:30pm - 3:00pm
Wednesday 9:00am - 12:30pm, 1:30pm - 3:00pm
Thursday 9:00am - 12:30pm, 1:30pm - 3:00pm
Friday 9:00am - 12:30pm, 1:30pm - 3:00pm
Saturday 9:00am - 11:00am
Sunday Closed