2012 Delaware Senate election

The 2012 Delaware Senate election was held on November 6, 2012 to elect all 21 members of the Delaware Senate. The election coincided with the elections for other offices, including the Presidency, U.S. Senate, U.S. House of Representatives, Governor, and state house. The primary election was held on September 11, 2012.

District 6: Republican incumbent and Minority Whip Liane Sorenson is retiring.

District 20: Democratic incumbent George Bunting is retiring.

Incumbent Democrat Harris McDowell III has represented the 1st district since 1977.

Incumbent Democrat Margaret Rose Henry has represented the 2nd district since 1994.

Incumbent Democrat Robert Marshall has represented the 3rd district since 1979.

The new 4th district includes the homes of incumbent Democrat Michael Katz, who has represented the 4th district since 2009, and Republican Liane Sorenson, who has represented the 6th district since 1995. Sorenson didn't seek re-election. Katz lost re-election here to Republican Gregory Lavelle.

Incumbent Republican Catherine Cloutier has represented the 5th district since 2001.