Places beginning with OL in Illinois, United States
Old Brownfield
Old Du Quoin
Oldenburg
Old Gilchrist
Old Kane
Old Kaskaskia
Old Marissa
Old Mill Creek
Old Mill Grove (subdivision)
Old Niota
Old Pearl
Old Princeton
Old Ripley
Old Ripley, Township of
Old Salem Chautauqua
Old Shawneetown
Old State Mobile Home Village
Old Stonington
Oldtown
Oldtown, Township of
Olena
Olga
Olin
Olio, Township of
Olive Branch
Olive Branch Election Precinct
Oliver
Oliver
Olivet
Olive, Township of
Olmsted
Olmsted Election Precinct
Olney
Olney, Township of
Olsen-Hansen Row Houses (subdivision)
Olympia Fields