There are currently 16 U.S. Routes—14 mainline routes and two official special routes—that exist entirely or partially in New York. In New York, U.S. Routes are mostly maintained by the New York State Department of Transportation (NYSDOT), with some exceptions. U.S. Routes in New York are generally directly referenced by NYSDOT with their number; however, the letter "U" is suffixed to the number of the route on reference markers and in internal documents if there is numerical duplication between a U.S. Route and a state route. Two such numerical duplications exist: U.S. Route 2 and New York State Route 2 (US 2 and NY 2; inventoried as "2U" and "2", respectively), and US 15 and NY 15 ("15U" and "15").
The "From" column indicates the southern or western terminus of the route; likewise, the "To" column indicates the northern or eastern terminus of the route. The "mi" and "km" columns give the length of the route in miles and kilometers, respectively. Designations that are shaded in dark gray are numbers not currently assigned to a highway.
The original plans for US 7 had the route entering New York at Amenia and following modern US 44 and NY 22 south to New York City. The route was reconfigured by 1929 to bypass New York to the east.
US 9E was the designation ultimately assigned to the proposed US 109 from New York City to Waterford. At Waterford, US 9E merged with US 9W to become US 9. Most of US 9E was absorbed by an extended US 9 in 1930.
US 9W follows the west bank of the Hudson River from New Jersey to Albany, where it ends at US 9. The route serves several riverside locations, namely Newburgh, Kingston, and Catskill. The portion of the route north of Kingston closely parallels the New York State Thruway (I-87).
US 15 follows a generally northerly alignment through southeastern Steuben County from Lawrenceville, Pennsylvania, to Painted Post, where it ends at an interchange with I-86. It formerly extended north along NY 15 and NY 415 to Rochester, where it ended. It was truncated in 1974 to end at I-86. All of US 15 between I-86 and Pennsylvania is signed concurrently with Interstate 99.
US 20 extends across the entire state, from Ripley in the west to New Lebanon in the east. It passes through Buffalo and Albany and serves several smaller cities in the Finger Lakes region, where US 20 has a lengthy overlap with NY 5.
US 44 begins at US 209 near Kerhonkson, a hamlet in the town of Wawarsing, and travels eastward across the state to Millerton. The route is concurrent with NY 55 from US 209 to Poughkeepsie, where both routes cross the Hudson River on the Mid-Hudson Bridge before splitting east of downtown.
US 62 traverses the westernmost counties of New York, indirectly serving Jamestown and directly serving Gowanda, Hamburg, and Buffalo. The route ends at NY 104 in downtown Niagara Falls.
US 209 enters New York at Port Jervis and heads generally northeasterly through Wurtsboro and Ellenville to Kingston, where it ends at an interchange with US 9W and NY 199.
US 220 entered New York just north of I-86/NY 17 exit 60 in the village of Waverly and ended 0.09 miles (0.14 km) later at Chemung Street, the pre-Southern Tier Expressway routing of NY 17 through the village. Before US 220 was decommissioned in New York, the route was maintained by the village of Waverly.
US 20A is a southerly alternate route of US 20 between Hamburg and East Bloomfield. Along the way, the route passes through the villages of East Aurora, Warsaw, and Geneseo.
US 62 Business follows Pine Avenue from NY 104 to US 62. The route connects US 62 to the Pine Avenue commercial district and Hyde Park, a large city park northeast of downtown. US 62 Business was formerly NY 62A.
^ abAutomobile Legal Association (ALA) Automobile Green Book, 1930–31 and 1931–32 editions, (Scarborough Motor Guide Co., Boston, 1930 and 1931). The 1930–31 edition shows New York state routes prior to the 1930 renumbering
^Automobile Blue Book. Vol. 3. Chicago: Automobile Blue Book, Inc. 1929. p. 13. Retrieved August 30, 2010.
^ abcAutomobile Blue Book. Vol. 1 (1927 ed.). Chicago: Automobile Blue Book, Inc. 1927. This edition shows U.S. Routes as they were first officially signed in 1927.