U.S. Route 9 in New York

U.S. Route 9
Map of New York with US 9 highlighted in red and former routings maintained as reference routes in blue
Route information
Maintained by NYSDOT, NYCDOT, PANYNJ, Westchester County, and the cities of Yonkers, Hudson, Albany, Saratoga Springs, Glens Falls, and Plattsburgh
Length	324.72 mi[1] (522.59 km)
Existed	November 11, 1926[2]–present
Tourist routes	Lakes to Locks Passage Mohawk Towpath Scenic Byway
Major junctions
South end	I-95 / US 1-9 / US 46 at the New Jersey state line in Manhattan
Major intersections	I-95 / US 1 / NY 9A / Henry Hudson Parkway in Manhattan I-87 / I-287 / New York Thruway / NY 119 in Tarrytown Bear Mountain State Parkway in Peekskill US 6 / US 202 in Cortlandt I-84 / NY 52 in Fishkill US 44 / NY 55 in Poughkeepsie I-90 in Schodack I-787 / US 20 / NY 5 in Albany I-90 / NY 377 in Albany NY 9N / NY 9P / NY 29 / NY 50 in Saratoga Springs US 11 in Champlain
North end	I-87 in Champlain
Location
Country	United States
State	New York
Counties	New York, Bronx, Westchester, Putnam, Dutchess, Columbia, Rensselaer, Albany, Saratoga, Warren, Essex, Clinton
Highway system
United States Numbered Highway System List Special Divided New York Highways Interstate US State Reference Parkways
← NY 8 → NY 9A
← NY 9D US 9E → NY 9F ← NY 108 US 109 → NY 109

U.S. Route 9 (US 9) is a part of the United States Numbered Highway System that runs from Laurel, Delaware, to Champlain, New York. In New York, US 9 extends 324.72 miles (522.59 km) from the George Washington Bridge in Manhattan to an interchange with Interstate 87 (I-87) just south of the Canadian border in the town of Champlain. US 9 is the longest north–south U.S. Highway in New York. The portion of US 9 in New York accounts for more than half of the highway's total length.

The section of US 9 in New York passes through busy urban neighborhoods, suburban strips, and forested wilderness. It is known as Broadway in Upper Manhattan, the Bronx and much of Westchester County,^[3] and uses parts of the old Albany Post Road in the Hudson Valley, where it passes the historic homes of a U.S. President (Franklin D. Roosevelt) and Gilded Age heir.^[4] It passes through the downtown of Albany, the state capital,^[5] as well as Saratoga Springs.^[6] It penetrates into the deep recesses of the Adirondack Park and runs along the shore of Lake Champlain,^[7] where it is part of the All-American Road known as the Lakes to Locks Passage.^[8]

US 9 spawns more letter-suffixed state highways than any other route in New York, including the longest, 143-mile (230 km) New York State Route 9N (NY 9N).^[9] Outside of the cities it passes through, it is a mostly a two-lane road, save for two freeway segments in the mid-Hudson region. For much of its southern half, it follows the Hudson River closely; in the north it tracks I-87 (Adirondack Northway).