Kootenai County in Idaho is the largest producer of silver in the the United States.
Coeur d’Alene District
The Coeur d’Alene district has many old mines dating back to 1860 mostly producing silver. All the streams contain placer gold that can be panned. Several old lode mines in the area as well. Most of the district is situated in Shoshone County, but this district is one of the most mineral rich areas in Idaho and the world. The Coeur d’Alene mines produce more silver than all the rest of the states put together.