White caps were groups involved in the whitecapping movement who were operating in southern Indiana in the late 19th century. They engaged in vigilante justice and lynchings, with modern viewpoints describing their actions as domestic terrorism. They became common in the state following the American Civil War and lasted until the turn of the 20th century. White caps were especially active in Crawford and neighboring counties in the late 1880s. Several members of the Reno Gang were lynched in 1868, causing an international incident. Some of the members had been extradited to the United States from Canada and were supposed to be under federal protection. Lynchings continued against other criminals, but when two possibly innocent men were killed in Corydon in 1889, Indiana responded by cracking down on the white cap vigilante groups, beginning in the administration of Isaac P. Gray.

Crawford County is a county located in the U.S. state of Indiana. As of 2020, the population was 10,526. The county seat is English.