St. Louis Headquarters 2021 Congressional Dr. St. Louis, MO 63146 314-731-4444 St. Louis Parker Store 2021 Congressional Dr. St. Louis, MO 63146 314-731-4444 Decatur Parker Store 2415 N. 22nd St. Decatur, IL 62526 217-428-7118 O'Fallon Parker Store 1718 W. Terra Ln O'Fallon, MO 63366 314-731-4444