State Road 121, also known as New Jersey Route 121, is a short state highway located in New Jersey. It runs approximately 2.5 miles, connecting the communities of Burlington and Bordentown. The route primarily serves local traffic and provides access to various residential areas and businesses. The road begins at the intersection with U.S. Route 130 in Burlington and ends at the junction with New Jersey Route 206 in Bordentown. State Road 121 is maintained by the New Jersey Department of Transportation and plays a role in the regional transportation network, facilitating travel within the area.