French Imperiale River Genoa (directional)
Oneida (Lake) (main entry)
New York, United States Lake Ontario Mohawk River Oneida County, New York, United States (main entry)
Utica, Oneida County, New York, United States Oneida Castle, Oneida County, New York, United States (main entry)
One Leg, Tuscarawas County, Ohio, United States (main entry)
Columbus (directional)
Onezkoe (Lake) (main entry)
Olonetz, Russia Ongar, Essex, United Kingdom (main entry)
London (directional)
Chipping Ongar (synonym for Ongar, Essex, United Kingdom)
Ongole, Ongole, Carnatic, Hindoostan (main entry)
Britain Condapilly (directional)
Madras (directional)
Onion River (main entry)
Vermont, United States Lake Champlain Onondaga (Lake) (main entry)
New York, United States Lake Ontario Onondaga County, New York, United States (main entry)
Syracuse (directional)
Onondaga, Onondaga County, New York, United States (main entry)
Utica (directional)
Onrust (Island) (main entry)
Java Batavia Harbour Dutch British Onslow County, North Carolina, United States (main entry)
Ontario (Lake) (main entry)
North America Lake Erie Niagara River Onondago River Iroquois River St. Lawrence River York Harbour Kingston Harbour British Sackets' Harbour Americans Ontario County, New York, United States (main entry)
Canandaigua, Ontario County, New York, United States Ontario County, Upper Canada (Historical), Canada Ontario, Wayne County, New York, United States (main entry)
Oodamally, Coimbetore, Hindoostan (main entry)
Oonalashka (Island), Northern Archipelago (main entry)
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