Rosemont is an unincorporated community located within Delaware Township in Hunterdon County, New Jersey, United States. Its ZIP code is 08556. Located at the top of a small hill, the center of the community is located along Kingwood Stockton Road (County Route 519) near its intersections with Raven Rock Rosemont Road and Rosemont Ringoes Road (CR 604). Farmland (for which it is listed on the National Register of Historic Places) and residences make up the surrounding area while the center of the settlement includes residences, a post office, and an antique shop.