Elmont–UBS Arena (also known as Elmont) is a Long Island Rail Road (LIRR) station in Elmont and Bellerose Terrace, New York, just east of the Nassau County border with the New York City borough of Queens. It serves the LIRR Main Line and was built as part of the redevelopment of Belmont Park, which included the construction of the UBS Arena for the NHL's New York Islanders hockey team. The station opened for eastbound service in November 2021 and westbound service in October 2022.

Plans for the station were first announced in July 2019 by then-New York governor Andrew Cuomo. New York Arena Partners, the main party behind the Belmont Park redevelopment, would pay $97 million of the estimated $105 million cost, with the balance being paid by the state. The station was the first completely new LIRR station since 1976, when the now-dismantled Southampton College station opened. The project was seen as a vital part of the Belmont Park redevelopment project. Though the Elmont station serves a portion of Elmont that did not previously have full-time train service, opponents of UBS Arena have claimed that the station plans conceal the real motivation behind building the arena.

The LIRR's officials stated that they did not expect the new Elmont station to generate new commuter ridership – but that the station would instead result in a shift of existing riders living in Bellerose Terrace and Elmont who previously used other stations. With the operation of the Elmont station, existing levels of commuter service to other LIRR stations (e.g., Queens Village, Bellerose, Floral Park) has been maintained, and officials further stated that the addition of the Elmont–UBS Arena station would not result in an impact to commuter service.

On November 20, 2021, the eastbound platform opened for the Islanders' first game at UBS Arena that night. While construction of the westbound platform continued, customers were required to use free shuttle buses or walk to UBS Arena or Belmont Park station until the westbound platform opened the following year. The westbound platform officially opened on October 6, 2022, for the Islanders–Devils preseason game that night.

On February 8, 2023, the LIRR announced that the Elmont–UBS Arena station would be served by trains on the Port Jefferson Branch as far as Huntington and on the Ronkonkoma Branch, with limited service during peak hours and most trains stopping during weekday evening or weekend hours. As of April 2024, service is primarily provided by trains on the Hempstead Branch, with the Ronkonkoma and Port Jefferson Branches providing limited service.

Platform level	Platform A, side platform
	Track 3	←      Hempstead Branch toward Grand Central Madison, Atlantic Terminal, or Penn Station (Queens Village)
	Track 1	←      Main Line services do not stop here →
	Track 2	←      Main Line services do not stop here →
	Track 4	←      Hempstead Branch toward Hempstead (Bellerose) →
	Platform B, side platform
G	Ground level	Exit/entrance and buses

This station has two 12-car-long side platforms, both of which are compliant with the Americans with Disabilities Act of 1990. Unlike the Belmont Park station directly to the south, it is able to serve Main Line trains from both the west and east. The station also includes platform canopies, LED signs, benches, USB charging ports, bike racks, and art.

The station is located directly east of (and partially over) the overpass across the Cross Island Parkway. The location of the station gives platform access on the Bellerose Terrace side via an overpass.

Media related to Elmont (LIRR station) at Wikimedia Commons

• Elmont–UBS Arena – LIRR
• Elmont–UBS Arena LIRR timetable
• Elmont (The LIRR Today)
• Platform from Google Maps Street View