New York State Route 25B (NY 25B) is a 7.25-mile (11.67 km) east–west state highway located on Long Island in New York, United States. The western terminus of the route is at an intersection with NY 25 in Queens. The eastern terminus is at an interchange with NY 25 in Westbury, Nassau County. NY 25B is named Hillside Avenue for its entire length, except for a 0.69-mile (1.11 km) portion in the village of East Williston, where it is called East Williston Avenue and owned & maintained by Nassau County as the unsigned County Route 85.

Bellerose is an ethnically diverse, middle-class neighborhood on the eastern edge of the New York City borough of Queens, along the border of Queens and Nassau County, Long Island. It is adjacent to Bellerose Village and Bellerose Terrace in Nassau County, from which it is separated by Jericho Turnpike. The northern edge of Bellerose is separated from another part of the Nassau border by the neighborhood of Floral Park, Queens to the east, divided by Little Neck Parkway.