The origin of the river's name is the source of minor local controversy. Some say that the name comes from the jumping water in the many rapids which mark nearly the upper half of its course. Others maintain that the river was so-named because a 19th-century forest fire jumped the river. Still others suggest that log drivers named it for the way the water level "jumps" up and down rapidly after rains and thaws. Its name in Ojibwe does not shed light on its present name either, since the Ojibwa call this stream Manidoons-ziibi ("Little Spirit River").
Indians lived along the Jump in the early years, growing little plots of crops on the river bottoms.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikipedia, U.S. Geological Survey historical maps, the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.