Old Lebanon, Wisconsin
Oliver, Wisconsin
Olivet, Wisconsin
Oma, Wisconsin
Omro, Wisconsin
Onalaska, Wisconsin
Oneida, Wisconsin
Ono, Wisconsin
Ontario, Wisconsin
Oostburg, Wisconsin
Orange, Wisconsin
Orange Mill, Wisconsin
Orchard Grove, Wisconsin
Oregon, Wisconsin
Orfordville, Wisconsin
Orienta, Wisconsin
Orihula, Wisconsin
Orion, Wisconsin
Ormsby, Wisconsin
Orva, Wisconsin
Osborn, Wisconsin
Osceola, Wisconsin
Oshkosh, Wisconsin
Osman, Wisconsin
Osseo, Wisconsin
Ostrander, Wisconsin
Otis, Wisconsin
Otsego, Wisconsin
Ottawa, Wisconsin
Otter Creek, Wisconsin
Ottman Corners, Wisconsin
Oulu, Wisconsin
Ourtown, Wisconsin
Owen, Wisconsin
Oxbo, Wisconsin
Oxford, Wisconsin
Pacific, Wisconsin
Packard, Wisconsin
Packwaukee, Wisconsin
Paddock Lake, Wisconsin
