Downieville is a census-designated place in and the county seat of Sierra County, California, United States. Downieville is on the North Fork of the Yuba River, at an elevation of 2,966 feet. The 2020

The Downie River is an approximately 5.5 mi tributary of the North Yuba River in Sierra County, California, in the United States. The river originates from the confluence of the West Branch Downie Riv