James Owen "Jim" Sullivan is an American lawyer and Democratic politician from Milwaukee County, Wisconsin. He was a member of the Wisconsin Senate, representing the 5th Senate district during the 2007–2008 and 2009–2010 sessions.

The 5th Senate district of Wisconsin is one of 33 districts in the Wisconsin Senate. Located in southeast Wisconsin, the district is composed of parts of western Milwaukee County, and eastern Waukesha County. It includes the cities of Brookfield and Pewaukee, and the villages of Elm Grove and Pewaukee, as well as most of the cities of Wauwatosa and West Allis, and parts of the cities of Milwaukee and Waukesha.