New York State Route 47 (NY 47) was a long state highway around Rochester in New York, in the United States. It formed a semicircle through the inner suburbs of Rochester, following expressways west and east of the city and surface streets south of Rochester. The western terminus of the route was at an interchange with NY 104 west of the city limits in Greece. The eastern terminus was at an intersection with Culver Road in Irondequoit mere yards from Lake Ontario. In between its western and eastern extents, NY 47 met Interstate 490 (I-490) twice. The limited-access highway portions of the route were known as the Rochester Outer Loop (or Outer Loop) in contrast to the Inner Loop around downtown Rochester.