In 2014, there were 22 states with Libertarian candidates on the ballot for U.S. Senate. Six candidates got at least 3%. The average Libertarian percentage was 2.3%.
| Candidate | State | Votes (unofficial) | Percentage (unofficial) |
| Mark Fish | AK | 8,358 | 3.7% |
| Nathan LaFrance | AR | 17,103 | 2.0% |
| Gaylon Kent | CO | 50,089 | 2.6% |
| Amanda Swafford | GA | 48,918 | 1.9% |
| Michael Kokoski | HI | 8,936 | 2.4% |
| Doug Butzier | IA | 8,292 | 0.7% |
| Sharon Hansen | IL | 131,543 | 3.8% |
| Randall Batson | KS | 36,002 | 4.3% |
| David Patterson | KY | 44,231 | 3.1% |
| Brannon McMorris | LA | 13,024 | 0.9% |
| Jim Fulner | MI | 62,504 | 2.0% |
| Heather Johnson | MN | 29,682 | 1.5% |
| Roger Roots | MT | 7,705 | 2.1% |
| Sean Haugh | NC | 108,183 | 3.7% |
| Joe Baratelli | NJ | 16,304 | 0.9% |
| Mike Montchalin | OR | 34,661 | 3.0% |
| Victor Korcher | SC | 33,654 | 2.7% |
| Joshua James | TN | 5,672 | 0.4% |
| Rebecca Paddock | TX | 133,467 | 2.9% |
| Robert Sarvis | VA | 53,396 | 2.4% |
| John Buckley | WV | 7,331 | 1.6% |
| Joe Porambo | WY | 3,672 | 2.2% |
In 2012, there were 14 states with Libertarian candidates on the ballot for U.S. Senate. Four candidates got at least 3%. The average Libertarian percentage was 2.6%.
| Candidate | State | Votes | Percentage |
| Marc Victor | AZ | 102,109 | 4.6% |
| Paul Passarelli | CT | 25,045 | 1.7% |
| Andrew “Andy” Horning | IN | 145,282 | 5.7% |
| Dean Ahmad | MD | 32,252 | 1.2% |
| Andrew Ian Dodge | ME | 5,624 | 0.8% |
| Scotty Boman | MI | 84,480 | 1.8% |
| Jonathan Dine | MO | 165,468 | 6.1% |
| Dan Cox | MT | 31,892 | 6.6% |
| Kenneth R. Kaplan | NJ | 16,803 | 0.5% |
| Chris Edes | NY | 32,002 | 0.5% |
| Rayburn Douglas Smith | PA | 96,926 | 1.7% |
| Shaun Crowell | TN | 20,936 | 0.9% |
| John Jay Myers | TX | 162,354 | 2.1% |
| Joseph Kexel | WI | 62,240 | 2.1% |
In 2010, there were 20 states with Libertarian candidates on the ballot for U.S. Senate. Three candidates got at least 3%. The average Libertarian percentage was 1.8%.
| Candidate | State | Votes | Percentage |
| Fredrick “David” Haase | AK | 1,459 | 0.6% |
| David F. Nolan | AZ | 80,097 | 4.7% |
| Gail Lightfoot | CA | 175,242 | 1.8% |
| Maclyn Stringer | CO | 22,589 | 1.3% |
| Jim Rash | DE | 2,101 | 0.7% |
| Alexander Snitker | FL | 24,850 | 0.5% |
| Chuck Donovan | GA | 68,750 | 2.7% |
| Jeff Mallan | HI | 2,957 | 0.8% |
| John Heiderscheit | IA | 25,290 | 2.3% |
| Michael Labno | IL | 87,247 | 2.4% |
| Rebecca Sink-Burris | IN | 94,330 | 5.4% |
| Michael Wm. Dann | KS | 17,922 | 2.1% |
| Randall T. Hayes | LA | 13,957 | 1.1% |
| Jonathan Dine | MO | 58,663 | 3.0% |
| Michael Beitler | NC | 55,687 | 2.1% |
| Keith Hanson | ND | 3,890 | 1.6% |
| Ken Blevens | NH | 4,753 | 1.0% |
| Randy Credico | NY | 24,869 | 0.5% |
| John Clifton | NY | 18,414 | 0.4% |
| Marc Delphine | OR | 16,028 | 1.1% |