Route 184 is a state highway in New Jersey, United States. It is an old section of Route 440 that was rerouted. Route 184's western end is at an intersection with the Garden State Parkway in Woodbridge Township; NJ 184's eastern end is at an intersection with Route 35 in Perth Amboy. The highway passes several local landmarks along the highway, but is less populated than the surrounding area. The entire highway is concurrent with County Route 501, but is not county-maintained.

The route originated as Route S4, which became NJ 440 on January 1, 1953. In 1974, a part of Route 440 was bypassed and rerouted, and the New Jersey State Highway Department reassigned the former alignment as NJ 184.

New Jersey Route 184 begins at an interchange with Garden State Parkway (New Jersey Route 444) and County Route 501 at Interchange 129. The county route designation continues along the state designation. The highway heads eastward along King Georges Road, which turns to the north near Fords Park. Right after the split, Route 184 interchanges at a partial cloverleaf with U.S. Route 9. The highway continues eastward and intersects Laurel Street. The highway passes to the north of Hopelawn Park.

Route 184 continues, passing the local Ukrainian Cemetery, and intersecting with the southern terminus of County Route 655 (Florida Grove Road). Route 184 continues eastward, intersecting with Columbus Drive, which ends near a local reservoir. The highway continues eastward along Pfefiffer Boulevard until coming upon the interchange with New Jersey Route 440, where it splits to the north and the highway ends at an intersection with New Jersey Route 35 north of the Route 440 interchange.

Route 184 originated as a prefixed spur of Route 4 (currently an alignment of U.S. Route 9), New Jersey State Highway Route S-4, first defined in 1927. The highway was an alignment from the new Outerbridge Crossing to Route 4. It was eventually extended from Route 4 to the recently built Route 4 Parkway (now the Garden State Parkway) in 1951. In the 1953 renumbering on January 1, 1953, Route S-4 was decommissioned and renumbered to Route 440 to match up with New York State Route 440 in Staten Island. Route 440 was constructed into a freeway in 1972.

With the bypass of Route 440's original alignment in Perth Amboy, the New Jersey State Highway Department maintained the prior routing. In 1974, Route 440's original alignment was renumbered as Route 184.

The entire route is in Middlesex County.