Portland
| 2023 | Alex Palou |
| 2022 | Scott McLaughlin |
| 2021 | Alex Palou |
| 2019 | Will Power |
| 2018 | Takuma Sato |
| 2007 | Sebastien Bourdais |
| 2006 | AJ Allmendinger |
| 2005 | Cristiano da Matta |
| 2004 | Sebastien Bourdais |
| 2003 | Adrian Fernandez |
| 2002 | Cristiano da Matta |
| 2001 | Max Papis |
| 2000 | Gil de Ferran |
| 1999 | Gil de Ferran |
| 1998 | Alex Zanardi |
| 1997 | Mark Blundell |
| 1996 | Alex Zanardi |
| 1995 | Al Unser Jnr |
| 1994 | Al Unser Jnr |
| 1993 | Emerson Fittipaldi |
| 1992 | Michael Andretti |
| 1991 | Michael Andretti |
| 1990 | Michael Andretti |
| 1989 | Emerson Fittipaldi |
| 1988 | Danny Sullivan |
| 1987 | Bobby Rahal |
| 1986 | Mario Andretti |
| 1985 | Mario Andretti |
| 1984 | Al Unser Jnr |
Team
| 2023 | Chip Ganassi Racing |
| 2022 | Team Penske |
| 2021 | Chip Ganassi Racing |
| 2019 | Team Penske |
| 2018 | RLL Racing |
| 2007 | Newman Haas Lanigan Racing |
| 2006 | Forsyth Racing |
| 2005 | KV Racing |
| 2004 | Newman Haas Racing |
| 2003 | Fernandez Racing |
| 2002 | Newman Haas Racing |
| 2001 | Team Rahal |
| 2000 | Marlboro Team Penske |
| 1999 | Walker Racing |
| 1998 | Chip Ganassi Racing |
| 1997 | Pacwest Racing Group |
| 1996 | Chip Ganassi Racing |
| 1995 | Marlboro Team Penske |
| 1994 | Marlboro Team Penske |
| 1993 | Marlboro Team Penske |
| 1992 | Newman Haas Racing |
| 1991 | Newman Haas Racing |
| 1990 | Newman Haas Racing |
| 1989 | Patrick Racing |
| 1988 | Penske Racing |
| 1987 | Truesports |
| 1986 | Newman Haas Racing |
| 1985 | Newman Haas Racing |
| 1984 | Galles Racing |
Qualifying
| 2023 | 0:58.319 | Graham Rahal |
| 2022 | 0:58.234 | Scott McLaughlin |
| 2021 | 0:58.770 | Alex Palou |
| 2019 | 0:57.811 | Colton Herta |
| 2018 | 0:57.346 | Will Power |
| 2007 | 0:58.000 | Justin Wilson |
| 2006 | 0:57.631 | Bruno Junqueira |
| 2005 | 0:57.597 | Justin Wilson |
| 2004 | 0:59.229 | Sebastien Bourdais |
| 2003 | 0:58.793 | Paul Tracy |
| 2002 | 0:58.679 | Cristiano da Matta |
| 2001 | 0:57.785 | Max Papis |
| 2000 | 0:57.738 | Helio Castroneves |
| 1999 | 0:58.193 | Juan Montoya |
| 1998 | 0:58.358 | Bryan Herta |
| 1997 | 0:59.383 | Scott Pruett |
| 1996 | 0:59.893 | Alex Zanardi |
| 1995 | 0:59.687 | Jacques Villeneuve |
| 1994 | 1:00.071 | Al Unser Jnr |
| 1993 | 1:00.902 | Nigel Mansell |
| 1992 | 1:00.658 | Emerson Fittipaldi |
| 1991 | 0:56.497 | Emerson Fittipaldi |
| 1990 | 0:56.655 | Danny Sullivan |
| 1989 | 0:57.634 | Teo Fabi |
| 1988 | 0:58.298 | Danny Sullivan |
| 1987 | 0:59.207 | Roberto Guerrero |
| 1986 | 1:12.275 | Emerson Fittipaldi |
| 1985 | 0:59.932 | Danny Sullivan |
| 1984 | 0:59.437 | Mario Andretti |
