List of United States Senators from Delaware

This is a listing of the United States Senators from Delaware. They were originally elected by the Delaware General Assembly for designated six-year terms beginning March 4. Frequently portions of the term would remain only upon a senator's death or resignation. From 1914 the senators were popularly elected on the first Tuesday after November 1, and starting 1935 the beginning of their term is January 3, not March 4.

Class 1
Senators belonging to this electoral class were first elected in 1788 to two-year terms that expired at the end of the 1st United States Congress, and had to stand for re-election to a full six-year term in 1790. The seats were most recently contested in 2006, and the next full election will be in 2012.

Class 2
Senators belonging to this electoral class were first elected in 1788 to four-year terms that expired at the end of the 2nd United States Congress, and had to stand for re-election to a full six-year term in 1792. The seats were most recently contested in 2008, and the next full election will be in 2014.

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