List of state routes in New York

The following is a list of numbered state highways in the U.S. state of New York. Signed state highways in New York, referred to as "touring routes" by the New York State Department of Transportation, are numbered from 1 to 899. A large number of unsigned state highways, known as "reference routes", are numbered from 900 to 999 and carry a suffix. Four reference routes have been signed as touring routes and as such are listed on this page.

The first set of routes in New York were assigned in 1924, replacing a series of unsigned legislative routes that had existed since 1908. Initially, there were only 29 routes; by the late 1920s, there were several dozen highways. In the 1930 state highway renumbering, some of these routes were reconfigured or renumbered while hundreds of other, smaller routes were assigned. Since that time, routes have been added and removed from the state highway system at various times for reasons ranging from the construction and/or removal of highways to the result of "maintenance swaps", or transfers of highway maintenance from the state of New York to lower levels of government and vice versa. State-maintained portions of routes have reference markers, small, green signs that are posted approximately every one-tenth mile along the side of the roadway.

Signed reference routes
The 900 through 999 designations are reserved for reference routes, which are unsigned state-maintained highways of varying length. Four of these routes have been signed as touring routes and are listed below.

Former routes

 * NY 1, NY 4, NY 6, NY 9, NY 9W, NY 11, NY 15, NY 15A, NY 20, NY 44, NY 62, NY 104, NY 202, NY 209, and NY 219 were removed due to the creation of the U.S. highways with the same number.

Reserved routes

 * NY-181.svg NY 181
 * NY-188.svg NY 188
 * NY-229.svg NY 229 - Reserved for NY 7 between NY 7A and the New York-Pennsylvania state line. Once reserved (circa 1967) for the Nassau Expressway (now NY 878) east of the proposed Clearview Expressway near John F. Kennedy Airport.
 * NY-341.svg NY 341 - Reserved for Cortland County
 * NY-381.svg NY 381
 * NY-382.svg NY 382 - Reserved for NY 88
 * NY 388
 * NY-393.svg NY 393 - Reserved for Chautauqua Lakeway between I-86/NY 17 and NY 5
 * NY-399.svg NY 399 - Reserved for Hudson River Expressway
 * NY-413.svg NY 413 - Reserved for NY 9A
 * NY 435 - Reserved for NY 29A between NY 30A and NY 10
 * NY 450
 * NY 451
 * NY 452
 * NY 478 - Reserved for Henry Hudson Parkway
 * NY 484
 * NY 485
 * NY 486
 * NY 487
 * NY 490
 * NY 546 - Reserved for Balltown Road
 * NY 646 - Reserved for an old alignment of NY 146 in Schenectady
 * NY 656 - Reserved for NY 911E
 * NY 790 - Reserved for NY 49 and NY 365 (Utica-Rome Expressway, and dual carriageway Verona to Rome)
 * NY 819
 * NY 822
 * NY 823
 * NY 836
 * NY 841
 * NY 852
 * NY 854
 * NY 856
 * NY 862
 * NY 866