St Charles Library 77 Boone Hills Dr Saint Peters, MO 63376 Phone : (636) 441-2300 Business Category Libraries St Charles City-county Library 425 Spencer Rd Saint Peters, MO 63376 Phone : (636) 441-2300 Business Category Libraries St Charles City-county Library District 77 Boones Hill Dr Saint Peters, MO 63376 Phone : (636) 441-2300 Business Category