South Main Street, Phillipsburg, New Jersey, is located in the most southern region of Warren County, New Jersey, at the confluence of the Lehigh and Delaware Rivers. The town was incorporated in 1861 and, through the years, has maintained a main street feel with architecture dating back to the eighteen-fifties. While here, enjoy our local events and riverfront activities like the Train Excursion and festival, tubing on the Delaware River, or exploring the many walking trails that follow the Morris Canal to the gated opening on the Delaware River.