Sixty people are killed and 867 others injured in a mass shooting at a country music festival at the Las Vegas Strip in the United States; the gunman, Stephen Paddock, later commits suicide.

On October 1, 2017, a mass shooting occurred when 64-year-old Stephen Paddock opened fire on the crowd attending the Route 91 Harvest music festival on the Las Vegas Strip in Nevada from his 32nd-floor suites in the Mandalay Bay hotel. He fired more than 1,000 rounds, killing 60 people and wounding at least 413 others. The ensuing panic brought the total number of injured to approximately 867. About an hour later, he was found dead in his room from a self-inflicted gunshot wound. The motive for the shooting is officially undetermined.

Route 91 Harvest was a country music festival in the United States that was held annually in Paradise, Nevada, from 2014 to 2017 in the Las Vegas Village, a 15-acre (6.1 ha) lot on Las Vegas Boulevard, directly across from the Luxor Las Vegas hotel and casino and diagonally across from the Mandalay Bay resort and casino. The festival's promoters were Live Nation Entertainment and MGM Resorts International.

The Las Vegas Strip is a stretch of Las Vegas Boulevard in Clark County, Nevada, that is known for its concentration of resort hotels and casinos. The Strip, as it is known, is about 4.2 mi (6.8 km) long, and is immediately south of the Las Vegas city limits in the unincorporated towns of Paradise and Winchester, but is often referred to simply as "Las Vegas".

Stephen Craig Paddock was an American mass murderer who perpetrated the 2017 Las Vegas shooting. Paddock opened fire into a crowd of about 22,000 concertgoers attending a country music festival on the Las Vegas Strip, killing 60 people and injuring approximately 867. Paddock killed himself in his hotel room following the shooting. The incident is the deadliest mass shooting by a lone shooter in United States history. Paddock's motive remains officially undetermined, and the possible factors are the subject of speculation.