The 1911 United States Senate election in New York was held from January 17 to March 31, 1911, by the New York State Legislature to elect a U.S. Senator (Class 1) to represent the State of New York in the United States Senate.
Republican Chauncey M. Depew had been re-elected to this seat in 1905, and his term would expire on March 3, 1911.
At the State election in November 1910, John Alden Dix was elected Governor, the first Democratic governor since 1894; 29 Democrats, 21 Republicans and 1 Independence Leaguer were elected for a two-year term (1911–1912) in the State Senate; and 86 Democrats, 63 Republicans and 1 Independence Leaguer were elected for the session of 1911 to the Assembly. The 134th New York State Legislature met from January 4 to October 6, 1911, at Albany, New York.
Ex-Lieutenant Governor William F. Sheehan announced his candidature formally in a letter to Mayor of Buffalo Louis P. Fuhrmann which was published on December 30, 1910. Before the State election, when a Democratic victory seemed to be improbable, Sheehan had made an agreement with Tammany Hall leader Charles Francis Murphy that the Tammany men would support Sheehan for the U.S. Senate.
The Democratic caucus met on January 16. 91 State legislators attended, but 25 were absent. Speaker Daniel D. Frisbie presided. The caucus nominated Sheehan. Edward M. Shepard, the defeated Democratic candidate for Mayor of New York in the election of 1901; and Ex-Supreme Court Justice D. Cady Herrick, the defeated Democratic candidate for Governor of New York in the election of 1904, also received votes at this caucus.