The Coeur d'Alene, Idaho, labor riot of 1899 was the second of two major labor-management confrontations in the Coeur d'Alene mining district of northern Idaho in the 1890s. Like the first incident seven years earlier, the 1899 confrontation was an attempt by union miners, led by the Western Federation of Miners to unionize non-union mines, and have them pay the higher union wage scale. As with the 1892 strike, the 1899 incident culminated in a dynamite attack that destroyed a non-union mining facility, the burning of multiple homes and outbuildings and two murders, followed by military occupation of the district.

The riot of 1899 resulted from the miners' frustrations with mine operators that paid lower wages, hired Pinkerton or Thiel operatives to infiltrate the union, and the refusal of non-union miners to join or strike.

Angered by wage cuts, Coeur d'Alene area miners conducted a strike in 1892. The strike erupted in violence when union miners discovered they had been infiltrated by a Pinkerton agent who had routinely provided union information to the mine owners. After several deaths, the U.S. army occupied the area and forced an end to the strike. The response to that violence, disastrous for the local miners' union, became the primary motivation for the formation of the Western Federation of Miners (WFM) the following year.

Pro-union sentiment remained strong in the area, and by 1894, most of the mines were unionized, represented by the Knights of Labor.

Violence erupted in the Coeur d'Alene district during the national Pullman railroad strike of 1894. Union members attacked non-union mines and workers. Forty masked men shot to death John Kneebone, who had testified against union miners in 1892. Others kidnapped a mine superintendent, and tried to blow up the powder house at the Bunker Hill mine.

Urged by the mine owners, the Idaho governor requested federal troops, supposedly to prevent interruptions in railroad service along the Northern Pacific route through the Coeur d'Alene area. President Grover Cleveland sent about 700 troops in July 1894. Major General John Schofield, determined to avoid embroiling his troops in a local labor dispute as they were in 1892, directed that the Army confine its mission to keeping the railroads running, and not take orders from state or local officials. The Army patrolled the railroad lines, and reported no disturbances or local opposition. The union members, wanting to avoid another military occupation, stopped the attacks on non-union targets.

The Army repeatedly reported that there were no disturbances of rail transport, and requested permission to withdraw the troops. The mine owners pressured the Cleveland administration to keep the troops in place. The mine owners eventually realized that the Army would not expand its mission beyond protecting the railroad, and dropped their opposition to withdrawal of the troops. The Army units left the Coeur d'Alene in September 1894.^p. 163-165

In December 1894, the Bunker Hill and Sullivan mine shut down rather than agree to the union demand of a uniform wage of $3.50 (~$127.00 in 2024) per day. The mine reopened in June 1895, with nonunion labor paying $3.00 per day to miners and $2.50 to surface employees and unskilled underground labor. The company said that whenever the combined prices of lead and silver rose again to a certain point, they would restore the old wage rate.