New York State Route 55 (NY 55) is a state highway in southern New York, running from the Pennsylvania state line at the Delaware River in Barryville to the Connecticut state line at Wingdale. It is the only other state highway beside NY 7 to completely cross the state, from border to border, in an east–west direction, although NY 17 does so and is partially east–west. It also forms a concurrency when it joins US 44 for 33 miles (53 km).