Metropark station is an intermodal transportation hub on the Northeast Corridor in the Iselin section of Woodbridge Township in Middlesex County, New Jersey that is located 24.6 miles southwest of New York Penn Station. It is owned and operated by NJ Transit and serves Amtrak and NJ Transit's Northeast Corridor Line. NJ Transit runs peak period 'loop' buses in coordination with train schedules.

The station is near the interchange of Route 27 and Garden State Parkway near exits 131 and 132. and has a multi-story parking facility that is open at all times.

The station, built by the New Jersey Department of Transportation (NJDOT) and the United States Department of Transportation, opened on November 14, 1971, as Garden State Metropark. It was built as a suburban park-and-ride stop for the then-new high-speed rail Metroliners.

Metropark was one of two park-and-ride infill stations proposed in the 1960s for use by the new Metroliners, the other being Capital Beltway in Lanham, Maryland, just outside Washington, D.C. The two stations were originally named Capital Beltway Metropark and Garden State Metropark; these were shortened to Capital Beltway and Metropark. Both were conceived as public-private partnerships. Under a plan put forward in late 1968 by the New Jersey Department of Transportation (NJDOT) the state would contribute $648,000 toward the cost of the station, then estimated at $1.4 million.

Amtrak service to Metropark began on November 14, 1971. The station's cost had increased to $2.6 million, shared by NJDOT and the United States Department of Transportation. It had two 850-foot (260 m) high-level platforms and had 820 parking spaces. It was next to the Garden State Parkway to allow easy access by automobile; a large business park – "the first Edge City in the world to grow from a parking lot" – soon grew near the station. Commuter trains continued to use Iselin station, half a mile east.

The station was officially renamed Harrison A. Williams Metropark Station on July 30, 1979, in recognition of Senator Williams' support for its construction. After his 1981 conviction for bribery and conspiracy in the Abscam scandal, local officials campaigned to have his name removed from the station, though it remained until at least 1984. Northbound on- and off-ramps were added to the Garden State Parkway at Exit 131A in November 1986 to improve station access.

In January 2007, NJ Transit announced a nearly $30 million renovation plan for the station, to be completed by 2010. Reconstruction was completed by Anselmi & DeCicco, Inc. of Maplewood, NJ in summer 2009, and cost $47 million. Climate-controlled shelters and LCD train information systems were installed, platforms were extended to accommodate 12-car trains, canopies were lengthened and the station building was enlarged as part of the project.

On April 12, 2023, one of the two staircases between the underpass and the southbound platform was closed.

The station is served by NJ Transit Rail Operations Northeast Corridor Line. The station has two high-level side platforms flanking the four tracks of the Northeast Corridor. Amtrak's long-haul services and most Keystone Service trains that utilize the Northeast Corridor bypass the station via the inner tracks, as do some NJ Transit express trains. Until 2005, the eastbound Pennsylvanian also stopped at Metropark. Amtrak trains skip most other stations between Trenton and Newark Penn Station, but many trains stop at Metropark despite having to switch to the outside (local) tracks to do so. Pairs of 45-mph crossovers (interlockings MENLO and ISELIN) just east and west of the station were added about 1986 to make this easier.

Five peak-hour "Metropark Loop" routes, operated by NJ Transit as bus routes 801–805, connect the station to the surrounding office parks and residential areas.

• Metropark, NJ – Amtrak
• Metropark, NJ – Station history at Great American Stations (Amtrak)

• Metropark (USA RailGuide – TrainWeb)
• Station from Google Maps Street View