New York State Route 26A

New York State Route 126
Map of northern New York with NY 126 highlighted in red
Route information
Maintained by NYSDOT
Length:	28.56 mi (45.96 km)
Existed:	late 1970s – present
Major junctions
West end:	NY 12 on Watertown city/town line
	NY 26 in West Carthage
East end:	NY 812 in Croghan
Location
Counties:	Jefferson, Lewis
Highway system
New York Highways Interstate U.S. State Reference Parkways ← NY 125 NY 127 → ← NY 26 NY 26B →

New York State Route 126 (NY 126) is a state highway in the North Country of New York in the United States. It proceeds in a roughly northwest to southeast direction between NY 12 at the eastern city line of Watertown in central Jefferson County and NY 812 in the village of Croghan in northern Lewis County. In between, NY 126 serves the adjacent villages of West Carthage and Carthage, where the route has overlaps with NY 3 (in Carthage) and NY 26 (in West Carthage). Most of the route passes through rural areas, and the portion southeast of Carthage parallels either the Black River or a tributary of it.

The portion of NY 126 between Carthage and Croghan was originally part of New York State Route 26A, an alternate route of NY 26 assigned as part of the 1930 renumbering of state highways in New York. It began at NY 26 in Lowville and passed through Croghan before ending at NY 3 and NY 26 in Carthage. At the time, the section of what is now NY 126 from Broad Street in West Carthage to James Street in Carthage was part of NY 26.