New York State Route 438 (NY 438) is a north–south state highway located entirely in Erie County, New York, in the United States. Though signed as north–south, the route runs in an almost east–west direction for 11.78 miles (18.96 km) between Gowanda and Irving through the Cattaraugus Indian Reservation. The southern terminus of the route is at an intersection with U.S. Route 62 (US 62) and NY 39 in Gowanda. Its northern terminus is at a junction with US 20 and NY 5 in Irving. The route was assigned in the mid-1940s. Although it is signed as a state route, the state does not maintain any of the route.

New York State Route 437 (NY 437) is a state highway located south of Auburn in Cayuga County, New York, in the United States. At 0.30 miles (0.48 km) in length, it is the shortest signed state route in New York. It is a brief connector route between NY 38 and NY 38A known locally as White Bridge Road. The highway allows motorists, especially those wanting quick access to the opposite side of nearby Owasco Lake, to avoid having to cross the Owasco Outlet further downstream, in the city. NY 437 was assigned in 1970; however, the designation had appeared on maps of the area as early as two decades before.