List of former state routes in New York (401–500)
# List of former state routes in New York (401–500)

This section of the list of former state routes in New York contains all routes numbered above 401. To date, New York State Route 456 is the highest numbered former state route in New York.

| Route | Southern or western terminus | Northern or eastern terminus | Formed | Removed |
| - | - | - | - | - |
| NY 401 (1930s-1950s) | US 9 in Stockport | NY 9H in Ghent | 1930s | early 1950s |
| NY 401 (1970-1973) | NY 36 in Dansville | NY 21 near Wayland village | 1970 | ca. 1973 |
| NY 402 | Ferry landing in Tivoli | NY 9G in Tivoli | early 1930s | 1980 |
| NY 404 (1933-1940s) | NY 100 in Briarcliff Manor | US 9 near Ossining | 1933 | late 1940s |
| NY 405 | US 4 in North Greenbush | NY 66 in Troy | early 1970s | 1980 |
| NY 407 | NY 159 in Duanesburg | NY 160 in Florida | ca. 1931 | 1981 |
| NY 408 (1930-1938) | NY 86 in Harrietstown | NY 192 in Brighton | 1930 | ca. 1938 |
| NY 408A | NY 408 near Angelica village | NY 351 / NY 408 in Nunda | early 1940s | 1949 |
| NY 409 (1930-1938) | NY 3 in Hounsfield | NY 12E in Hounsfield | 1930 | ca. 1938 |
| NY 413 | Forks Road in Plainfield | US 20 in Plainfield | ca. 1931 | early 1950s |
| NY 415 (1930-mid-1960s) | NY 290 in East Syracuse | NY 298 in Collamer | 1930 | mid-1960s |
| NY 417 (1932-1950s) | NY 7 in Otego | Otego | ca. 1932 | mid-1950s |
| NY 419 (1933-1935) | NY 29 east of Schuylerville | US 4 north of Schuylerville | ca. 1933 | ca. 1935 |
| NY 422 | NY 16 / NY 78 in Elma | NY 358 in Marilla | ca. 1931 | 1980 |
| NY 424 | NY 380 in Stockton | NY 60 in Cassadaga | 1930 | 1980 |
| NY 427 (1931-1938) | NY 9N in Keene | US 9 in Elizabethtown | ca. 1931 | ca. 1938 |
| NY 428 | NY 39 in Forestville | US 20 in Silver Creek | ca. 1932 | 1980 |
| NY 432 (1935-1940) | NY 22 in Canaan | Massachusetts state line at Canaan | ca. 1935 | 1940 |
| NY 432 | Myers Creek in Rathbone | NY 417 in Addison | early 1940s | 1998 |
| NY 433 (1937-1940) | NY 30 in Middleburgh | NY 7 in Cobleskill | ca. 1937 | ca. 1940 |
| NY 433 (1950s-1960s) | NY 5 in Syracuse | NY 298 in Salina | early 1950s | mid-1960s |
| NY 434 (1940s) | NY 23 in Plymouth | NY 12 in North Norwich | ca. 1940 | early 1940s |
| NY 435 | NY 167 in Manheim | NY 5 in Manheim | ca. 1940 | early 1940s |
| NY 436 (1950s-1960s) | NY 433 in DeWitt | Carrier Circle in DeWitt | early 1950s | mid-1960s |
| NY 439 | NJ 439 at the New Jersey state line at Staten Island | St. George ferry landing on Staten Island | 1949 | ca. 1968 |
| NY 439A | NY 440 on Staten Island | NY 439 on Staten Island | late 1940s | ca. 1968 |
| NY 456 | NY 22 in Beekmantown | US 9 in Beekmantown | 1970 | 2015 |
