Annandale is the penultimate station heading westbound on New Jersey Transit's Raritan Valley Line, located in the Annandale section of Clinton Township in Hunterdon County, New Jersey, United States. The station is located just off interchange 18 of Interstate 78 at the junction of Main Street and East Street. The final stop before High Bridge, it has one low-level side platform, with a shelter, 77 parking spaces and bicycle racks.

The Raritan Valley Line is a commuter rail service operated by New Jersey Transit (NJT) which serves passengers in municipalities in Union, Somerset, Middlesex, Essex and Hunterdon counties in the Raritan Valley region in central New Jersey, United States. The line's most frequent western terminus is Raritan station in Raritan. Some weekday trains continue farther west and terminate at the High Bridge station, located in High Bridge. Most eastbound trains terminate in Newark; passengers are able to transfer to NJ Transit using a combined ticket or PATH and Amtrak to New York City. A limited number of weekday trains continue directly to New York.