The Las Vegas Monorail is a 3.9-mile (6.3 km) automated monorail mass transit system located adjacent to the Las Vegas Strip in Clark County, Nevada, United States. It connects several large casinos in the unincorporated communities of Paradise and Winchester just south of Las Vegas city limits. Built at a cost of $650 million, it was privately owned and operated by the Las Vegas Monorail Company until their 2020 bankruptcy. It was then sold to the Las Vegas Convention and Visitors Authority, a local government agency. In 2022, total annual ridership was roughly 4.3 million, down from a pre-Great Recession peak of 7.9 million in 2007. The monorail is a registered not-for-profit corporation, allowed under Nevada law since the monorail provides a public service. The State of Nevada assisted in bond financing, but no public money was used in construction.

The Las Vegas Monorail began service as the MGM Grand-Bally's Monorail in 1995. This system ran between the MGM Grand and Bally's hotels using two used Mark IV monorail trains that had operated on the Walt Disney World Monorail. Built through a partnership between the two hotels, the MGM-Bally's system's construction was contracted to VSL Corporation. The grand opening party for the monorail featured showgirls from Bally's famed show, Jubilee!, helping groups to the monorail. Characters from The Wizard of Oz greeted the groups on the MGM side. The two trains each ran back and forth on each beam, and were stored at a maintenance building near the Bally's station (this building still stands today, but it has been severed from the beam).

In 2002, the original system was closed to begin its conversion to the current Las Vegas Monorail system. The beam was extended from Bally's station (now the Horseshoe & Paris station) north to the Sahara Hotel and Casino. The track was extended south beyond the MGM station to provide for track switching for the trains, as well as a starting point for a potential future southern extension. The original trains were replaced with nine new Bombardier Mark VI monorail trains.

During testing and commissioning, the monorail suffered several malfunctions that delayed the start of passenger service for almost a year. The most serious of these problems related to parts falling from the monorail to the ground under the tracks. After many delays, the finished Las Vegas Monorail opened to the public on July 15, 2004 with the completion and testing of "Phase 1".

On September 8, 2004, more problems with falling parts led to the closing of the monorail for nearly four months. It reopened on December 24, 2004. A number of repairs were made to the monorail cars during this shutdown. Each time the monorail system required major engineering changes, it underwent a lengthy "commissioning" process to confirm the effectiveness and safety of the repairs. Officials reported that each day the monorail was down cost the system approximately $85,000 in lost fares.

Transit Systems Management officials cited the successful handling of crowds during the 2005 Consumer Electronics Show as proof that the system could handle a major convention.

On July 8, 2005, Transit Systems Management announced that it would shut down, turning over its responsibilities to the Las Vegas Monorail Company, the system operator. Curtis Myles, a former deputy general manager of the Regional Transportation Commission of Southern Nevada, became President of the Las Vegas Monorail Company.

On November 1, 2005, the County Commission approved a study into the feasibility of an airport extension.