This section of the list of former state routes in New York contains all routes numbered between 26 and 50.
| Route | Southern or western terminus | Northern or eastern terminus | Formed | Removed | |
|---|---|---|---|---|---|
| NY 26 (1924-1930) | NY 13 near Freeville | NY 5 in Camillus | 1924 | 1930 | |
| NY 26A | NY 12 / NY 26 in Lowville | NY 3 in Carthage | 1930 | 1978[1] | |
| NY 26B | NY 26 in Alexandria | NY 37 in Alexandria | ca. 1931 | mid-1970s | |
| NY 28B | NY 287 in Prospect | NY 12 / NY 28 in Remsen | ca. 1936 | mid-1960s | |
| NY 30 (1924-1930) | US 9 in Mechanicville | Canadian border at Mooers | 1924 | 1930 | |
| NY 31A (Onondaga County) | NY 5 in Elbridge | NY 31 in Jordan | mid-1920s | 1930 | |
| NY 31A (western Niagara County) | NY 3 / NY 18 in Niagara Falls | NY 31 on Lewiston–Cambria town line | late 1920s | 1935 | |
| NY 31B (1932-1933) | US 11 in Cicero | NY 31 in Cicero | ca. 1932 | ca. 1933 | |
| NY 31B | NY 31 in Weedsport | NY 5 in Elbridge | ca. 1933 | 1980 | |
| NY 31C | NY 5 in Elbridge | NY 31 in Jordan | ca. 1933 | 2003 | |
| NY 31D | Orleans–Monroe county line | NY 19 / NY 31 in Sweden | ca. 1935 | ca. 1963 | |
| NY 32 (1920s-1930) | NY 5 in Amherst | Lake Road in Olcott | mid-1920s | 1930 | |
| NY 32A (1930-early 1940s) | US 4 / NY 32 in Stillwater | US 4 / NY 32 in Schuylerville | 1930 | early 1940s | |
| NY 32B | NY 32 in Queensbury | US 4 in Hudson Falls | 1930 | mid-1960s | |
| NY 33B (1931-1940s) | NY 96 in Pittsford | NY 33 / NY 350 in Walworth | ca. 1931 | 1949 | |
| NY 33B (1962-1965) | NY 33A in Chili | NY 383 in Rochester | ca. 1962 | ca. 1965 | |
| NY 33B (1965-1970s) | NY 33 in Buffalo | NY 33 in Cheektowaga | ca. 1965 | mid-1970s | |
| NY 34 (1924-1930) | NY 5 in Buffalo | Fort Niagara near Youngstown | 1924 | 1930 | |
| NY 34A | NY 13 in Ithaca | NY 34 in Lansing | 1930s | mid-1960s | |
| NY 35 (mid-1920s-1927) | NY 16 in East Aurora | NY 4 near Livonia village | mid-1920s | 1927 | |
| NY 35 (1927-early 1940s) | NY 36 in Wheatland | US 104 in Ontario | 1927 | early 1940s | |
| NY 35A | US 62 / NY 18 in Buffalo | NY 35 in Cheektowaga | 1930 | mid-1930s | |
| NY 35B | NY 35 / NY 47 in Rochester | NY 35 in Penfield | 1930s | early 1940s | |
| NY 36A | NY 36 in Dansville | NY 63 in Mount Morris | 1930 | early 1940s | |
| NY 37 (mid-1920s-1927) | NY 17 in Monroe | Connecticut state line near Brewster | mid-1920s | 1927 | |
| NY 37 (late 1920s-1930) | NY 40 in Cato | NY 31 in Baldwinsville | late 1920s | 1930 | |
| NY 37A | NY 37 in Lisbon | NY 37 in Waddington | 1930 | 1980 | |
| NY 37D | NY 37 in Theresa town | NY 26 in Theresa village | ca. 1936 | mid-1960s | |
| NY 38 (1920s-1930) | NY 62 near Angelica | NY 14 in Penn Yan | mid-1920s | 1930 | |
| NY 39 (1920s-1930) | NY 21 in Poughkeepsie | NY 22 in Patterson | mid-1920s | 1930 | |
| NY 40A | NY 40 in Schaghticoke | NY 40 / NY 67 in Schaghticoke | ca. 1933 | late 1940s | |
| NY 41 (1920s-1930) | Ferry landing at Barrytown | NY 22 in North East | mid-1920s | 1930 | |
| NY 42 (1920s-1930) | NY 15 in Owego | NY 26 in Freeville | mid-1920s | 1930 | |
| NY 44 (1920s-1930) | NY 7 in Sidney | NY 5 / NY 12 in Utica | mid-1920s | 1930 | |
| NY 44 (1930-1935) | NY 13 in Caton | NY 3 in Wolcott | 1930 | 1935[2] | |
| NY 44A | US 44 in Washington | US 44 / NY 82 in Millbrook | 1980 | 2007 | |
| NY 45 (1920s-1930) | US 9E in Troy | MA 2 at the Massachusetts state line at Stephentown | mid-1920s | 1930 | |
| NY 45 (1930-late 1949) | New Jersey state line at Warwick | US 9W in New Windsor | 1930 | 1949 | |
| NY 46A | NY 49 / NY 365 in Rome | NY 46 in Western | 1930 | early 1950s | |
| NY 47 (1920s-1930) | US 9 in Chestertown | NY 30 in Ticonderoga | mid-1920s | 1930 | |
| NY 47 (1930-1936) | US 9 in Lake George | NY 8 in Hague | 1930 | 1936 | |
| NY 47 | NY 104 in Greece | Culver Road in Irondequoit | ca. 1937 | 1980 | |
| NY 48 (1920s-1930) | NY 12 in Lowville | NY 3 in Alexandria | mid-1920s | 1930 | |
| NY 48A | NY 48 in Minetto | NY 48 in Oswego | ca. 1931 | ca. 1940 | |
| NY 50 (mid-1920s-1927) | PA 7 at the Pennsylvania state line at Port Jervis | NY 10 in Kingston | mid-1920s | 1927 |