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Post Commons

300 Alby St., Alton, IL 62002

(618) 433-8871

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Hours of Operation

Monday - Saturday: 7 a.m. to 2 p.m.


Red Diamonds

Post Commons is the new daytime living room for Alton.  Located in the beautifully renovated 1909 Federal Post Office, it offers a relaxing atmosphere to enjoy world-class coffee, a brunch kitchen, whiskey bar and event space. Take in the beautiful views of the Mississippi River and linger as long as you like!


Red Diamonds
Dining & Entertainment
  • Breakfast:
  • Private Rooms Available:
  • WiFi Access:


Red Diamonds


Red Diamonds
Facility Info
Meeting Rooms
  • Number of Rooms 3
Hallie Room
  • Banquet Capacity: 200
Ryan Room
  • Banquet Capacity: 110
Post Master Room
  • Banquet Capacity: 15