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

Class 1 U.S. Senators belong to the electoral cycle that were elected for only one Congress in the first elections of 1788, and the seat was contested again for the 2nd, 5th, and every three Congresses (six years) thereafter. The seat in recent years has been contested in 2000, 2006, and 2012, with a special election in 2010. The next election will be in 2018.

Class 2

Class 2 U.S. Senators belong to the electoral cycle that were elected for the first two United States Congresses in the first elections of 1788, and the seat was next contested again for the 3rd, 6th, and every three Congresses (six years) thereafter. The seat in recent years has been contested in 2002, 2008, and 2014. The next election will be in 2020.

...
Wikipedia