Route 34 is a state highway in the central part of the U.S. state of New Jersey. The route runs from an intersection with Route 35 and Route 70 (the former Brielle Circle) in Wall Township, Monmouth County north to an intersection with U.S. Route 9 (US 9) in Old Bridge Township, Middlesex County. The route is a four-lane divided highway between its southern terminus and the north end of the Route 33 concurrency in Howell Township; along this stretch, the route intersects the Garden State Parkway and Interstate 195 (I-195)/Route 138 within a short distance of each other. North of Route 33, Route 34 is an undivided two- to four-lane road that intersects Route 18 in Colts Neck Township and Route 79 in Matawan. Route 34 passes through mostly suburban areas along its route.