Denoon was a village established by James DeNoon Reymert in 1852, straddling the county line between Waukesha and Racine counties in Wisconsin, 15 miles southeast of Waukesha, in range 20 E. of the towns of Muskego and Norway, on the shore of Lake Denoon. It was on the plank road between Milwaukee and Rochester, which Reymert is generally credited with getting built.