This section of the list of former state routes in New York contains all routes numbered between 1 and 25.
| Route | Southern or western terminus | Northern or eastern terminus | Formed | Removed | |
|---|---|---|---|---|---|
| NY 1 (1924-1927) | New York City line | Connecticut state line at Port Chester | 1924 | 1927 | |
| NY 1A | NY 27 in Manhattan | US 1 in Pelham Manor | 1934 | ca. 1962 | |
| NY 1B (1932-1941) | NY 1A in the Bronx | US 1 in New Rochelle | ca. 1932 | ca. 1941 | |
| NY 1B | Triborough Bridge in The Bronx | Grand Concourse in The Bronx | ca. 1941 | by 1947 | |
| NY 1X | Eastern Boulevard in The Bronx | NY 1A in The Bronx | 1941 | 1946 | |
| NY 2 (1924-1927) | PA 2 at the Pennsylvania state line at Kirkwood | NY 6 in Rouses Point | 1924 | 1927 | |
| NY 2 (1927-1939) | US 15 at the Pennsylvania state line at Lindley | NY 31 in Rochester | 1927 | ca. 1939 | |
| NY 2 (1939-early 1940s) | NY 17 / NY 17C in Owego | NY 33 / NY 35 in Rochester | ca. 1939 | early 1940s | |
| NY 2A (mid-1930s-1927) | NY 2 in Potsdam | NY 2 / NY 56 in Lawrence | mid-1920s | 1927 | |
| NY 2A (1930-1939) | NY 2 in Springwater | NY 2 in Rochester | 1930 | ca. 1939 | |
| NY 2A (1939-early 1940s) | NY 2 in Interlaken | US 20 / NY 5 in Waterloo | ca. 1939 | early 1940s | |
| NY 3A (1930-1932) | NY 3 / NY 271 in Middleport | NY 19 near Medina | 1930 | ca. 1932 | |
| NY 3A (1932-1935) | NY 3 / NY 425 in Lockport | NY 3 / NY 93 in Lockport | ca. 1932 | ca. 1935 | |
| NY 3B (1930-1932) | NY 237 in Clarendon | NY 3 / NY 63 in Sweden | 1930 | ca. 1932 | |
| NY 3B (1932-1935) | NY 3 / NY 271 in Middleport | NY 19 near Medina | ca. 1932 | ca. 1935 | |
| NY 3C (1930-1932) | NY 3 in Sterling | US 11 / NY 3 / NY 12 in Watertown | 1930 | ca. 1932 | |
| NY 3C (1932-1935) | NY 237 in Clarendon | NY 3 / NY 63 in Sweden | ca. 1932 | ca. 1935 | |
| NY 3D (1931-1932) | NY 3 in New Haven | NY 3C in Mexico | ca. 1931 | ca. 1932 | |
| NY 3D (1932-1935) | NY 3 in Sterling | US 11 / NY 3 / NY 12 in Watertown | ca. 1932 | 1935[1] | |
| NY 3E (1930-1932) | NY 3 in Red Creek | NY 3 in Oswego | 1930 | ca. 1932 | |
| NY 3E (1932-1935) | NY 3 in New Haven | NY 3D in Mexico | ca. 1932 | 1935 | |
| NY 3F (1931-1932) | NY 3 in Deferiet | NY 26 in Carthage | ca. 1931 | ca. 1932 | |
| NY 3F (1932-1935) | NY 3 in Red Creek | NY 3 in Oswego | ca. 1932 | 1935 | |
| NY 3G | NY 3 in Deferiet | NY 3 in Wilna | ca. 1932 | 1940s | |
| NY 4 (1924-1927) | Pennsylvania state line at Lindley | NY 3 in Rochester | 1924 | 1927 | |
| NY 5A (1924-mid-1920s) | NY 5 in Buffalo | NY 5 in Albany | 1924 | mid-1920s | |
| NY 5A (1933-1937) | US 20 / NY 5 in Aurelius | NY 5 in Sennett | ca. 1933 | ca. 1937 | |
| NY 6 (1924-1927) | New York City line | Canadian border at Rouses Point | 1924 | 1927 | |
| NY 6A | US 9 in Yonkers | US 9 in Tarrytown | mid-1920s | 1930 | |
| NY 6B | NY 5 in East Greenbush | NY 6 in Waterford | mid-1920s | 1927 | |
| NY 7 (1924-mid-1920s) | NY 6 in Troy | MA 7 at the Massachusetts state line at Stephentown | 1924 | mid-1920s | |
| NY 7 (mid-1920s-1927) | NY 5 in Albany | NY 5 in Buffalo | mid-1920s | 1927 | |
| NY 7B (1930-1970) | NY 7 in Unadilla | NY 7 / NY 28 in Oneonta | 1930 | 1970 | |
| NY 7C | NY 7 in Niskayuna | NY 7 in Colonie | ca. 1961 | late 1960s | |
| NY 8 (1924-1930) | NJ 8 at the New Jersey state line at Minisink | US 9W in Newburgh | 1924 | 1930 | |
| NY 9 (1924-1927) | NY 17 in Binghamton | Vermont state line at Hoosick | 1924 | 1927 | |
| NY 9C (1920s-1930) | US 9 in Albany | US 9 in Round Lake | 1920s | 1930 | |
| NY 9C (1930-early 1930s) | NY 129 in Croton-on-Hudson | US 9 in Peekskill | 1930 | early 1930s | |
| NY 9E | US 9 in Wappingers Falls | NY 376 in Wappinger | ca. 1933 | ca. 1939 | |
| NY 9F | US 9 in Poughkeepsie | US 9 in Rhinebeck | 1930 | ca. 1938 | |
| NY 9K | US 9 / NY 50 in Saratoga Springs | US 9 in Lake George | 1930 | early 1950s | |
| NY 9M | NY 8 in Horicon | US 9 in Chester | ca. 1931 | ca. 1939 | |
| NY 9W (1927-1930) | US 9 in Elizabethtown | US 9 in Keeseville | 1927 | 1930 | |
| NY 9X (1931-1936) | US 9 in Malta | US 9 / NY 50 in Saratoga Springs | ca. 1931 | 1935[2] | |
| NY 9X | US 9 in Manhattan | US 9 in The Bronx | 1935 | 1940s | |
| NY 10A (1920s-1930) | NY 10 in Long Lake | NY 10 in Johnsburg | late 1920s | 1930 | |
| NY 11 (1924-1927) | NY 2 in Mexico | NY 5 / NY 12 in Utica | 1924 | 1927 | |
| NY 12A (1928-1930) | NY 12 in Sherburne | NY 5 in New Hartford | 1928 | 1930 | |
| NY 12C | NY 5 / NY 5S / NY 8 / NY 12 in Utica | NY 12 / NY 28 / NY 287 in Barneveld | 1930 | 1970 | |
| NY 15 (1924-1939) | NY 17 / NY 17C in Owego | NY 33 / NY 35 in Rochester | 1924 | ca. 1939 | |
| NY 15A (1930-1939) | NY 15 in Interlaken | US 20 / NY 5 in Waterloo | 1930 | ca. 1939 | |
| NY 16A | PA 646 at the Pennsylvania state line at Allegany | NY 16 / NY 17 in Olean | ca. 1932 | 1962 | |
| NY 16B | NY 16 in West Seneca | NY 16 in West Seneca | ca. 1932 | unknown | |
| NY 17A (1920s-1930) | NY 17 in Randolph | NY 17 / NY 18 in Salamanca | mid-1920s | 1930 | |
| NY 17D | NY 17 in Elmira | Pennsylvania state line at Chemung | 1930 | early 1940s | |
| NY 17E | NY 17 in Corning | NY 17 in Elmira | 1930 | mid-1960s | |
| NY 17F | NY 17 in Andover | NY 17 in Addison | 1930 | early 1940s | |
| NY 17G | NY 19 in Willing | NY 17 / NY 248 in Greenwood | 1930 | early 1940s | |
| NY 17H (1930-1937) | NY 17 in Randolph | NY 17 / NY 18 in Salamanca | 1930 | ca. 1937 | |
| NY 17H (1940s-1970s) | NY 17C in Johnson City | NY 17 in Binghamton | by 1940 | 1970s | |
| NY 17J | NY 17 / NY 430 in Mayville | NY 17 in Jamestown | 1930 | 1973[3] | |
| NY 18A | US 62 / NY 18 / NY 39 in Collins | US 62 / NY 18 in Eden | 1930 | 1962 | |
| NY 18B | NY 240 in Orchard Park | US 62 / NY 18 / NY 324 in Amherst | ca. 1935 | 1962 | |
| NY 18C | NY 78 / NY 278 on Orchard Park – West Seneca town line | NY 35 / NY 78 in Depew | ca. 1932 | ca. 1938 | |
| NY 18D | Whirlpool Rapids Bridge at Niagara Falls | US 62 / NY 18 in Wheatfield | ca. 1932 | 1962[4] | |
| NY 18E | Queenston–Lewiston Bridge at Lewiston | NY 18F in Lewiston | early 1930s | early 1960s | |
| NY 18F (1934-1938) | NY 18 in Little Valley | NY 18 near Cattaraugus | ca. 1934 | ca. 1938 | |
| NY 19 (1924-1930) | NY 23 in Roxbury | US 6N in Kingston | 1924 | 1930 | |
| NY 20 (1924-1927) | NY 2 in Syracuse | NY 3 in Oswego | 1924 | 1927 | |
| NY 20A (1930-1932) | Pennsylvania state line at Ripley | US 20 in Silver Creek | 1930 | ca. 1932 | |
| NY 20A (1938-1939) | US 20 in Hamburg | US 20 / NY 5 in Avon | ca. 1938 | ca. 1939 | |
| NY 20B | US 20 in Brant | US 20 in Hamburg | 1930 | ca. 1932 | |
| NY 20C | NY 64 in Bloomfield | US 20 / NY 5 / NY 64 in Bloomfield | ca. 1931 | 1997 | |
| NY 20D | US 20 in Geneseo | NY 5 in Avon | ca. 1931 | ca. 1938 | |
| NY 20N | US 20 / NY 174 in Marcellus town | US 20 / NY 20SY / NY 92 in Cazenovia | 1937[5] | 1961 | |
| NY 20SY | US 20 / NY 321 in Skaneateles | US 20 / NY 20N / NY 92 in Cazenovia | 1951[6] | 1961 | |
| NY 21 (1924-1930) | US 9 in Poughkeepsie | CT 4 at the Connecticut state line at Amenia | 1924 | 1930 | |
| NY 21A | Vine Valley | US 20 / NY 5 in Canandaigua | 1930 | early 1940s | |
| NY 24 (1924-1930) | NY 45 in Stephentown | NY 30 in Fort Ann | 1924 | 1930 | |
| NY 24A | NY 24 / NY 25 in Queens | NY 110 in East Farmingdale | late 1950s | ca. 1962 | |
| NY 25C | NY 25 in Queens | NY 25 in Garden City Park | by 1940 | 1970 | |
| NY 25D | NY 24 / NY 25 in Queens | NY 25 in Westbury | early 1930s | 1958 |