O Cities in Wisconsin

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20 Wisconsin cities and towns start with O, from Oak Creek to Oxford. The largest is Oshkosh, with an estimated 67,242 people in July 2024, per the US Census Bureau.

Oak Creek Oakdale Oakfield Oconomowoc Oconomowoc Lake Oconto Oconto Falls Ogdensburg Oliver Omro Onalaska Ontario Oostburg Oregon Orfordville Osceola Oshkosh Osseo Owen Oxford