New York State Route 127 (NY 127) is a 6.36-mile (10.24 km) north–south state highway in Westchester County, New York, in the United States. It begins at an intersection with U.S. Route 1 in the village of Mamaroneck and ends at an interchange with I-287 in the city of White Plains. The route also connects to the Hutchinson River Parkway in the town of Harrison. NY 127 was assigned as part of the 1930 renumbering of state highways in New York; however, parts of the road had been state-maintained since the 1910s. Within White Plains, NY 127 is maintained by Westchester County as County Route 30 (CR 30). The concurrent county route designation is unsigned, as are all county routes in Westchester County.