Location #1: Opening scene
Near East 111th Street & South Champlain Avenue, Chicago, Illinois, United States
Location #2: Peerless Pharmacy
120 West Main Street, West Dundee, Illinois, United States
Location #3: The church
2915 West Palmer Street, Chicago, Illinois, United States
Location #4: Going back home
At 385 Old Sutton Road, Barrington, Illinois, United States
Location #5: Rooney’s house
225 Greenwood Street, Evanston, Illinois, United States
I was on site during the Momence filming. They used 2 banks at the same intersection, repeatedly redecorated for several banks within the film. They also repainted / installed different signs along the same main intersection for about a block in each direction. Digital effects created a fictitious T intersection based on these re-imaged buildings. Some of the signs and props were forwards while others had their signs and props (canned goods for example) in mirror image, so when they flipped the film everything looked normal. Yes, some scenes were filmed in mirror image.
And for the record, Tom Hanks was very personable.