2008 U.S. congressional elections (South Dakota)

In the 110th Congress, South Dakota had 1 Democrat and no Republicans in the U.S House, as well as 2 Democratic Senators.

In the 2008 elections, South Dakota elected 1 Democrat and no Republicans to the U.S House, and continues to have 2 Democratic Senators.

Senate
Incumbent (Democrat): Tim P. Johnson

Winner: Tim P. Johnson
 * Democratic candidate: Tim P. Johnson
 * Republican candidate: Joel Dykstra

At-Large District
Incumbent (Democrat): Stephanie Herseth Sandlin

Winner: Stephanie Herseth Sandlin
 * Democratic candidate: Stephanie Herseth Sandlin
 * Republican candidate: Chris Lien