New York State Route 100

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New York State Route 100
Map of Southeastern New York with NY 100 highlighted in red
Route information
Maintained by NYSDOT and Westchester County
Length	33.27 mi[1] (53.54 km)
Existed	1930[2]–present
Major junctions
South end	I-87 / New York Thruway / Cross County Parkway in Yonkers
Major intersections	Sprain Brook Parkway in Yonkers NY 119 / Bronx River Parkway in White Plains I-287 in White Plains Sprain Brook Parkway in Hawthorne NY 9A / NY 141 in Hawthorne Taconic State Parkway in Mount Pleasant NY 9A in Briarcliff Manor NY 133 / Taconic State Parkway in Millwood NY 35 in Somers
North end	US 202 in Somers
Location
Country	United States
State	New York
Counties	Westchester
Highway system
New York Highways Interstate US State Reference Parkways
← NY 99 → NY 100A

New York State Route 100 (NY 100) is a major north–south state highway in Westchester County, New York, in the United States. It begins parallel to Interstate 87 (I-87) at a junction with the Cross County Parkway in the city of Yonkers and runs through most of the length of the county up to U.S. Route 202 (US 202) in the town of Somers. NY 100 was designated as part of the 1930 renumbering of state highways in New York. Prior to becoming a state road, various sections of NY 100 were part of several important early roads in the county.