IndyCar Driver Power Rankings after 2018 IndyCar Grand Prix of Sonoma
By Asher Fair
Non-formulated IndyCar Driver Power Rankings
| Rank | Driver | Car, Team, Engine | Last Rank | Trend |
| 1 | Scott Dixon | #9, Chip Ganassi Racing, Honda | 1 | 0 |
| 2 | Alexander Rossi | #27, Andretti Autosport, Honda | 2 | 0 |
| 3 | Ryan Hunter-Reay | #28, Andretti Autosport, Honda | 5 | +2 |
| 4 | Will Power | #12, Team Penske, Chevrolet | 4 | 0 |
| 5 | Josef Newgarden | #1, Team Penske, Chevrolet | 3 | -2 |
| 6 | Simon Pagenaud | #22, Team Penske, Chevrolet | 6 | 0 |
| 7 | Robert Wickens | #6, Schmidt Peterson Motorsports, Honda | 7 | 0 |
| 8 | Sebastien Bourdais | #18, Dale Coyne Racing, Honda | 8 | 0 |
| 9 | Marco Andretti | #98, Andretti Herta Autosport, Honda | 13 | +4 |
| 10 | James Hinchcliffe | #5, Schmidt Peterson Motorsports, Honda | 11 | +1 |
| 11 | Graham Rahal | #15, Rahal Letterman Lanigan Racing, Honda | 10 | -1 |
| 12 | Ed Jones | #10, Chip Ganassi Racing, Honda | 14 | +2 |
| 13 | Takuma Sato | #30, Rahal Letterman Lanigan Racing, Honda | 9 | -4 |
| 14 | Spencer Pigot | #21, Ed Carpenter Racing, Chevrolet | 12 | -2 |
| 15 | Tony Kanaan | #14, A.J. Foyt Enterprises, Chevrolet | 17 | +2 |
| 16 | Zach Veach | #26, Andretti Autosport, Honda | 16 | 0 |
| 17 | Charlie Kimball | #23, Carlin Motorsport, Chevrolet | 15 | -2 |
| 18 | Matheus Leist | #4, A.J. Foyt Enterprises, Chevrolet | 18 | 0 |
| 19 | Gabby Chaves | #88, Harding Racing, Chevrolet | 19 | 0 |
| 20 | Max Chilton | #59, Carlin Motorsport, Chevrolet | 20 | 0 |
Biggest Movers
Up: Marco Andretti (+4)
Down: Takuma Sato (-4)
Formulated rankings predictions for after next race
Because of the fact that the IndyCar Grand Prix of Sonoma was the final race of the 2018 IndyCar season and the next race is scheduled to take place in the 2019 season, there are no formulated rankings predictions for the formulated IndyCar Driver Power Rankings after the next race in this edition of the power rankings.