The Harlan County War, or Bloody Harlan, was a series of coal industry skirmishes, executions, bombings and strikes that took place in Harlan County, Kentucky, during the 1930s. The incidents involved coal miners and union organizers on one side and coal firms and law enforcement officials on the other. The Harlan County coal miners campaigned and fought to organize their workplaces and better their wages and working conditions. It was a nearly decade-long conflict, lasting from 1931 to 1939. Before its conclusion, an unknown number of miners, deputies and bosses would be killed, state and federal troops would occupy the county more than half a dozen times, two acclaimed folk singers would emerge, union membership would oscillate wildly and workers in the nation's most anti-labor coal county would ultimately be represented by a union.

Harlan County is a county located in southeastern Kentucky. As of the 2020 census, the population was 26,831. Its county seat is Harlan. It is classified as a moist county—one in which alcohol sales are prohibited, but containing a "wet" city—in this case Cumberland, where package alcohol sales are allowed. In the city of Harlan, restaurants seating 100+ may serve alcoholic beverages.