Post Commons is a unique historic building that is quickly gaining a reputation as a premier events space for hosting meetings and corporate events. Post Commons can provide an overall capacity of 515 people. Each of their three main event spaces flow beautifully together for larger events, or you can rent one of the three event spaces individually with capacities of 110, 150, or 200.

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!