Below we have a list of all the polls used on this site. Only nonpartisan polls are used; polls taken by pollsters paid for by one of the parties are intentionally omitted. The dates given are when the poll started and ended. The polls for each state are sorted in descending order of their midpoints. Incumbents are denoted by an asterisk.
The data are also available as plain text and in .csv format for use with Excel. In the latter, the first column is the day number of the midpoint (Jan. 1, 2012 = day 1.0) and the second is the poll length in days.
The site also has a page describing the Senate races, including brief descriptions of the situation, the names and photos of the candidates, and links to their campaign pages, Wikipedia entries, and state parties.
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Alabama | Candidate unknown | 37% | Jeff Sessions | 63% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Alaska | Mark Begich | 48% | Candidate unknown | 47% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Arkansas | Mark Pryor | 100% | Candidate unknown | 0% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Colorado | Mark Udall | 53% | Candidate unknown | 43% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Delaware | Chris Coons | 65% | Candidate unknown | 35% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Georgia | Candidate unknown | 43% | Saxby Chambliss | 57% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Hawaii | Brian Schatz | 76% | Candidate unknown | 21% | Jan 01 | Jan 01 | Election 2010 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Idaho | Candidate unknown | 34% | Jim Risch | 58% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Illinois | Dick Durbin | 63% | Candidate unknown | 33% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Iowa | Tom Harkin | 63% | Candidate unknown | 37% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Kansas | Candidate unknown | 36% | Pat Roberts | 60% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Kentucky | Candidate unknown | 47% | Mitch McConnell | 53% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Louisiana | Mary Landrieu | 52% | Candidate unknown | 46% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Maine | Candidate unknown | 39% | Susan Collins | 61% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Massachusetts | Candidate unknown | 66% | Candidate unknown | 31% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Michigan | Carl Levin | 63% | Candidate unknown | 34% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Minnesota | Al Franken | 42% | Candidate unknown | 41% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Mississippi | Candidate unknown | 45% | Thad Cochran | 55% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Montana | Max Baucus | 73% | Candidate unknown | 27% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Nebraska | Candidate unknown | 40% | Mike Johanns | 58% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| New Hampshire | Jeanne Shaheen | 52% | Candidate unknown | 45% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| New Jersey | Frank Lautenberg | 56% | Candidate unknown | 42% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| New Mexico | Tom Udall | 61% | Candidate unknown | 39% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| North Carolina | Kay Hagan | 53% | Candidate unknown | 44% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Oklahoma | Candidate unknown | 39% | James Inhofe | 57% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Oregon | Jeff Merkley | 49% | Candidate unknown | 47% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Rhode Island | Jack Reed | 73% | Candidate unknown | 27% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| South Carolina | Candidate unknown | 42% | Candidate unknown | 58% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| South Dakota | Tim Johnson | 62% | Candidate unknown | 38% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Tennessee | Candidate unknown | 32% | Lamar Alexander | 65% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Texas | Candidate unknown | 43% | John Cornyn | 55% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Virginia | Mark Warner | 65% | Candidate unknown | 34% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| West Virginia | Candidate unknown | 64% | Candidate unknown | 36% | Jan 01 | Jan 01 | Election 2008 results | ||
| State | Democrat | D % | Republican | R % | I | I % | Start | End | Pollster |
| Wyoming | Candidate unknown | 27% | Michael Enzi | 73% | Jan 01 | Jan 01 | Election 2008 results | ||