Phillipsburg Union Station is an active railroad station museum, in Phillipsburg, New Jersey, United States, at 178 South Main Street. Opened in 1914, Union Station was built by the Delaware, Lackawanna & Western Railroad (DL&W) and shared with the Central Railroad of New Jersey (CNJ) and was situated where the lines merged before the bridge crossing the Delaware River. Designed by Frank J. Nies, the architect who produced many of DL&W stations now listed state and federal registers of historic places, the 2+1⁄2 story, 3 bay brick building is unusual example of a union station and a representation of early 20th century Prairie style architecture. The Phillipsburg Union Signal Tower, or PU Tower, is nearby, also restored to its original form, and available for tours.

Phillipsburg is a town located along the Delaware River that is the most populous municipality in Warren County, in the U.S. state of New Jersey. It is part of the Allentown-Bethlehem-Easton, PA-NJ metropolitan statistical area. As of the 2020 United States census, the town's population was 15,249, an increase of 299 (+2.0%) from the 2010 census count of 14,950, which in turn reflected a decline of 216 (−1.4%) from the 15,166 counted in the 2000 census.