The Silver Valley is a region in the northwest United States, in the Coeur d'Alene Mountains in northern Idaho. It is noted for its mining heritage, dating back to the 1880s.

Silver Valley is a narrow valley about 40 miles (64 km) in length, east of the city of Coeur d'Alene. The South Fork of the Coeur d'Alene River flows through the valley and Interstate 90 traverses the valley between Fourth of July Pass to the west and Lookout Pass on the Montana border.

Several towns are located in the valley, all in Shoshone County. These include (from west to east) Pinehurst, Smelterville, Kellogg, Wardner, Osburn, Silverton, Wallace, and Mullan. The Silver Valley has also been referred to as the Coeur d'Alene Valley and the Coeur d'Alene Mining District.

The Coeur d'Alene (Silver Valley) Mining District is located in Proterozoic metasediments. The mined portion of the stratigraphic column in the Silver Valley, known as the Belt series, can be divided into six main formations, three of which have upper and lower parts. These are, from oldest to youngest: the Prichard Formation (lower and upper), Burke Formation, Revett Formation, St. Regis Formation (lower and upper), Wallace Formation (lower and upper), and Striped Peak Formation. Of these, all but the Striped Peak are ore-bearing. All six of these formations are primarily composed of quartzite and argillite. Some limestone and dolomite also occur in the Wallace and Prichard, and a smaller amount of carbonate occurs in the St. Regis. Ripple marks and mud cracks occur throughout the series. Together, these imply a shallow marine depositional environment.

The mining district occurs along the intersection of two major regional structural features. A large anticline extends through the district, running in a north-northwesterly direction. The Lewis and Clark line – a series of strike-slip faults running across the Pacific Northwest – crosses this anticline, generally trending in an east-west direction. Within this mining district, the major structure of the lineament is the Osburn fault, which runs directly through the district’s most successful silver belts. Its 16-mile (27 km) displacement divides the district into two distinct parts, the southern Page Galena Belt, and the northern Golconda Lucky Friday Belt.

Three main minerals make up most of the ore production in the Silver Valley. Galena (PbS or lead(II) sulfide) is the most important ore mineral found in the Coeur d’Alene District veins. Galena is present in veins throughout the district. Sphalerite ((Zn,Fe)S) is the second most important ore mineral, present in at least small amounts in most veins. The sphalerite is an important source of zinc throughout the ore belts. The third most abundant ore mineral is tetrahedrite (Cu,Fe)₁₂Sb₄S₁₃. However, the tetrahedrite is responsible for the majority of the silver produced by the Silver Valley, as it is the tetrahedrite interspersed in the galena of the district that makes it so argentiferous.

A party of twelve miners led by Elias Davidson Pierce found gold in Orofino Creek, a tributary of the Clearwater River, in 1860. The ensuing gold rush continued through 1875 before slowing. Among the prospectors who came north seeking gold in the Coeur d'Alene Mountains was Andrew J. Prichard, who found gold in the alluvial sands of a creek near present-day Murray, Idaho in 1883. Later in the year, prospectors entered present day Burke Canyon seeking placer gold along Canyon Creek.

Miners and prospectors came to the region after gold and silver deposits were found in the Coeur d'Alene Mountains and the Northern Pacific Railroad came to the region in 1883. In the 1890s, two significant miners' uprisings took place in the Coeur d'Alene Mining District, where the workers struggled with high risk and low pay. In 1892, the union's discovery of a labor spy in their midst, in the person of Charlie Siringo, a sometime cowboy and Pinkerton agent, resulted in a labor strike that developed into a shooting war between miners and the company in Burke Canyon. When the mine owners planned to reduce wages of some workers to offset increased operating costs, the miners declared a strike against the reduction of wages and the increase in work hours and demanded a "living wage" be paid to every man working underground – the common laborer as well as the skilled in a stand for industrial unionism. To restore order to the state of rebellion in Shoshone County, Governor N. B. Willey declared martial law and sent federal troops to arrest and detain the union miners, but not before dozens of casualties including six deaths and the destruction of the Frisco Mill. A similar labor confrontation in 1899 took place after the union was launching an organizing drive of the few mines not yet fully unionized, where miners working in the Bunker Hill and Sullivan mines were receiving fifty cents to a dollar less per day than other miners. With no success in the effort, on April 29, 250 union members seized a train in Burke at gunpoint, according to the engineer, Levi "Al" Hutton. At each stop through Burke Canyon, more miners climbed aboard what was dubbed the "Dynamite Express" toward the site of the $250,000 Bunker Hill mine near Wardner; the miners then carried 3,000 pounds (1,400 kg) of dynamite into the mill and completely destroyed it. The crowd also burned down the company office, the boarding house, and the home of the mine manager. Like in the 1892 strike, martial law was declared by Governor Frank Steunenberg and wholesale arrests and mass incarcerations were done to bring back order.