Post Offices

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

Ottawa Post Office

Post Office in Ottawa, Illinois on E Etna Rd. Operating hours, phone number, services information, and other locations.

Address: 750 E Etna Rd, Ottawa, IL 61350
Phone: 815-433-1177
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Retail Hours

Monday 8:30am - 5:00pm
Tuesday 8:30am - 5:00pm
Wednesday 8:30am - 5:00pm
Thursday 8:30am - 5:00pm
Friday 8:30am - 5:00pm
Saturday 9:00am - 12:00pm
Sunday Closed

Lobby Hours

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 4:00pm
Sunday Closed

Last Collection Times

Monday 12:15pm - 2:15pm
Tuesday 12:15pm - 2:15pm
Wednesday 12:15pm - 2:15pm
Thursday 12:15pm - 2:15pm
Friday 12:15pm - 2:15pm
Saturday Closed
Sunday Closed

Downtown Ottawa Post Office

Address: 405 W Main St, Ottawa, IL 61350
Phone: 815-433-2021
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Marseill Post Office

Address: 100 Washington St, Marseilles, IL 61341
Phone: 815-795-2148
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Serena Post Office

Address: 3809 E 2276th Rd, Serena, IL 60549
Phone: 815-496-2837
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Grand Ridg Post Office

Address: 150 W Main St, Grand Ridge, IL 61325
Phone: 815-249-5520
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Seneca Post Office

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