| Race | Party | Name | Percentage |
| U.S. President | Democrat | Barack Obama (i)* | 88.5% |
| Uncommitted | 11.5% | ||
| Republican | Mitt Romney | 49.2% | |
| Rick Santorum | 28.9% | ||
| Newt Gingrich | 10.9% | ||
| Ron Paul | 9.5% | ||
| Others | 1.5% | ||
| U.S. Senate | Democrat | Ben Cardin (i) | 74.3% |
| C. Anthony Muse | 15.8% | ||
| Chris Garner | 2.8% | ||
| Others | 7.1% | ||
| Republican | Daniel John Bongino | 33.8% | |
| Richard J. Douglas | 28.4% | ||
| Joseph Alexander | 8.9% | ||
| Others | 28.9% | ||
| 1st District | Democrat | Wendy Rosen | 43.3% |
| John LaFerla | 42.8% | ||
| Kim Letke | 13.9% | ||
| Republican | Andy Harris (i)* | 100% | |
| 2nd District | Democrat | C.A. Dutch Ruppersberger (i)* | 100% |
| Republican | Nancy C. Jacobs | 59.2% | |
| Rick Impallaria | 23.8% | ||
| Larry Smith | 11.3% | ||
| Others | 5.8% | ||
| 3rd District | Democrat | John Sarbanes (i) | 86.4% |
| David H. Lockwood | 13.6% | ||
| Republican | Eric Delano Knowles | 33.5% | |
| Thomas E. "Pinkston" Harris | 28.8% | ||
| Armand F. Girard | 23.4% | ||
| Draper S. Phelps | 14.4% | ||
| 4th District | Democrats | Donna F. Edwards (i)* | 91.9% |
| George McDermott | 5% | ||
| Ian Garner | 3.1% | ||
| Republican | Faith M. Loudon | 61.6% | |
| Randy Gearhart | 19.7% | ||
| Charles Shepherd | 9.6% | ||
| Greg Holmes | 9.1% | ||
| 5th District | Democrat | Steny H. Hoyer (i)* | 84.8% |
| Cathy Johnson Pendleton | 15.2% | ||
| Republican | Tony O'Donnell | 73.6% | |
| David Hill | 14.1% | ||
| Glenn Morton | 13.3% | ||
| 6th District | Democrat | John Delaney | 54.4% |
| Rob Garagiola | 29.1% | ||
| Milad Pooran | 9.6% | ||
| Others | 6.9% | ||
| Republican | Roscoe G. Bartlett (i)* | 43.5% | |
| David R. Brinkley | 19.7% | ||
| Kathy Afzali | 10.3% | ||
| Others | 26.6% | ||
| 7th District | Democrat | Elijah Cummings (i)* | 92.8% |
| Charles U. Smith | 4.6% | ||
| Ty Glen Busch | 2.6% | ||
| Republican | Frank C. Mirabile | 69.8% | |
| M. Justin Kinsey | 30.2% | ||
| 8th District | Democrat | Chris Van Hollen (i)* | 92.4% |
| George English | 7.6% | ||
| Republican | Ken Timmerman | 46.3% | |
| Dave Wallace | 32.4% | ||
| Shelly Skolnick | 12.6% | ||
| Gus Alzona | 8.7% |
*i= incumbent candidate
Interactive by Drew Grossman and Tim Ebner/Capital News Service