New York State Route 275 (NY 275) is a north–south state highway in Allegany County, New York, in the United States. It runs for , connecting the village of Bolivar and NY 417 at its southern end with the hamlet of Friendship to the north, where it intersects the Southern Tier Expressway (NY 17 and Interstate 86 or I-86) by way of an interchange. The road continues north past the interchange to NY 19 in Belfast as County Route 17 (CR 17). NY 275 was assigned as part of the 1930 renumbering of state highways in New York to the portion of its routing south of Friendship. It was extended slightly northward in July 1974 to connect to the Southern Tier Expressway. Route description NY 275 begins at the intersection of Wellsville and Main streets in the village of Bolivar. At this point, NY 417 switches from South Main Street to Wellsville Street while NY 275 proceeds northeastward on the two-lane Main Street. The route initially passes by commercial buildings in the village's business district; however, they quickly give way to more residential areas after just two blocks. As the highway heads away from the village center, the homes become scattered ahead of intersections with the eastern terminus of County Route 5A (CR 5A, named Salt Rising Road) and the south end of CR 40 (Deans Flat Road). The rural trend soon reverses as NY 275 enters the adjacent village of Richburg. Here, NY 275 is also known as Main Street as it serves Richburg's business district and the surrounding residential neighborhoods. Past Richburg, NY 275 continues on a northeasterly track through the rural town of Wirt, running along the base of a narrow, largely undeveloped valley surrounding Little Genesee Creek as East Notch Road. The highway slowly increases in elevation for about , intersecting with the western terminus of CR 8 (Inavale Road) and passing a handful of farms on its way toward East Notch, a gap between two large hills that serves as Little Genesee Creek's source. It eventually turns north to traverse the pass before winding its way down the opposite side. A short distance later, NY 275 intersects with the northern terminus of CR 8 as it curves to take a northwesterly track into the town of Friendship. Just north of the town line, NY 275 enters the hamlet of Nile, where it becomes a two-lane