The community was founded by European settlers in 1770. Until 1891, it was called Ewings Neck. The Ewing family was one of the first to settle in the area and a "neck" is a name often given to a stretch of higher ground surrounded by marshes and low-lands.
Delmont's post office was established in 1851; mail first came by stagecoach and later by train after the Cape May and Millville Railroad opened in 1863.
Delmont's first church was a one-room wooden structure which also served as the village's first school.
Delmont United Methodist Church was built in 1872. The aging structure received renovations in Fall 2010 with the help of thousands of dollars worth of donations from churchgoers and local businesses.
Delmont School – a two-story wood-frame structure – was built in 1887. It was demolished in the summer of 2006 in order to make way for the town's first park.
^Martins, John. "Bridgeton doesn't want Camden's state inmates." The Press of Atlantic City. May 23, 2007. Accessed September 27, 2011. "Southern State Correctional Facility, located next to Bayside State Prison but technically in the township's Delmont area, has a population of about 2000."