The 2005 Trans-Am Series was the fortieth season of the Sports Car Club of America's Trans-Am Series. This would be the final complete season until the series returned in 2009. (Two events were held in Topeka in 2006,[1] but are considered to be exhibition and thus no championship was awarded.)
| Round | Circuit | Winning driver | Winning vehicle | |
|---|---|---|---|---|
| 1 | Long Beach |  Randy Ruhlman | Chevrolet Corvette | |
| 2 | Portland | Klaus Graf | Jaguar XKR | |
| 3 | Cleveland | Randy Ruhlman | Chevrolet Corvette | |
| 4 | Toronto | Paul Gentilozzi | Jaguar XKR | |
| 5 | Edmonton | Greg Pickett | Jaguar XKR | |
| 6 | San Jose | Boris Said | Ford Mustang | |
| 7 | Denver | Klaus Graf | Jaguar XKR | |
| 8 | Road America | Klaus Graf | Jaguar XKR | |
| 9 | Montreal | Klaus Graf | Jaguar XKR |
| Place | Driver | Points | |
|---|---|---|---|
| 1 | Klaus Graf | 246 | |
| 2 | Randy Ruhlman | 226 | |
| 3 | Greg Pickett | 219 | |
| 4 | Tomy Drissi | 195 | |
| 5 |  Joey Scarallo | 188 | |
| 6 | Paul Gentilozzi | 176 | |
| 7 |  Hima Maher | 143 | |
| 8 | John Baucom | 129 | |
| 9 | Moneca Kolvyn | 127 | |
| 10 | Paul Fix II | 105 | |
| 11 | Tom Cowen | 92 | |
| 12 | Max Lagod | 73 | |
| 13 | Mike Davis | 70 | |
| 14 | Michael Lewis | 58 | |
| 15 | Philip Simms | 55 | |
| 16 | Boris Said | 54 | |
| 17 | Tor Krueger | 29 | |
| 18 | Charlie Webster | 23 | |
| 19 | Kevin Nielsen | 18 | |
| 20 | Jeff Emery | 17 | |
| 21 | Tom Sherrill | 17 | |
| 22 | Cliff Ebben | 17 | |
| 24 | Amy Ruman | 16 | |
| 25 | James Bradley | 14 | |
| 26 | Blaise Csida | 13 | |
| 27 | Csaba Bujdoso | 12 | |
| 28 | Gordon Vipond | 11 | |
| 29 | John Schaller | 9 |