The Hammond Circus Train Wreck kills 86 and injures 127 near Hammond, Indiana.

The Hammond circus train wreck occurred on June 22, 1918, and was one of the worst train wrecks in U.S. history. Eighty-six people were reported to have died and another 127 were injured when a locomotive engineer fell asleep and ran his troop train into the rear of a circus train near Hammond, Indiana. The circus train held 400 performers and roustabouts of the Hagenbeck–Wallace Circus.

Hammond is a city in Lake County, Indiana, United States. Located along Lake Michigan, it is part of the Chicago metropolitan area and the only city in Indiana to border Chicago. As of the 2020 census, it is the eighth-most populous city in Indiana, with 77,879 residents. It was first settled in the mid-19th century and it is one of the oldest cities of northern Lake County.