1949 United States Senate special election in New York

The United States Senate special election of 1949 in New York was held on November 8, 1949. On June 28, 1949, incumbent senator Robert F. Wagner resigned due to ill health. On July 7, John Foster Dulles was appointed by Governor Thomas Dewey to fill the vacancy temporarily.

The Republican State Committee nominated Dulles to succeed himself. The Democratic State Committee nominated former Governor Herbert H. Lehman. The Liberal Party endorsed Lehman. The American Labor Party made no nominations and urged its members not to vote for any candidate. The Democratic/Liberal ticket was elected and Dulles was defeated.

Background
Longtime incumbent Senator Robert F. Wagner resigned effective June 29, 1949, citing ill health. Governor Thomas E. Dewey appointed John Foster Dulles, his foreign policy advisor, to fill the vacant seat until a successor could be duly elected, and a special election to complete Wagner's term in office was scheduled for November 8, 1949, to coincide with the regularly scheduled state election.

Democratic
Alex Rose, David Dubinsky, Adolf A. Berle, Americans for Democratic Action, and the International Ladies Garment Workers Union pushed for Herbert H. Lehman to seek the Democratic nomination.

General election

 * Herbert H. Lehman, former Governor of New York (Democratic and Liberal)
 * John Foster Dulles, incumbent Senator (appointed by Governor Dewey) and diplomat (Republican)

Dulles accused Lehman of working with communists while leading the United Nations Relief and Rehabilitation Administration and for accepting the support of the American Labor Party in previous elections. He also incorrectly claimed that the ALP also nominated Lehman.

Results
The number of votes Lehman received on the Liberal line was greater than his margin of victory.