2008 South Dakota Official General Election Results
Statewide Races
November 4, 2008
| Race | Party | Candidate | Votes | Percentage |
| Presidential Electors | DEM | Obama & Biden Electors | 170924 | 44.75% |
| Presidential Electors | CON | Baldwin & Castle Electors | 1895 | 0.50% |
| Presidential Electors | REP | McCain & Palin Electors | 203054 | 53.16% |
| Presidential Electors | IND | Barr & Root Electors | 1835 | 0.48% |
| Presidential Electors | IND | Nader & Gonzalez Electors | 4267 | 1.12% |
| United States Senate | DEM | Tim Johnson | 237889 | 62.49% |
| United States Senate | REP | Joel Dykstra | 142784 | 37.51% |
| United States Representative | DEM | Stephanie Herseth Sandlin | 256041 | 67.56% |
| United States Representative | REP | Chris Lien | 122966 | 32.44% |
| Public Utilities Commissioner | DEM | Matt McLarty | 108477 | 31.59% |
| Public Utilities Commissioner | CON | Eugene R Hidalgo | 12064 | 3.51% |
| Public Utilities Commissioner | REP | Gary Hanson | 222893 | 64.90% |