1989 IndyCar season Drivers and constructors Drivers and constructors

| Team | Chassis | Engine | Tires | Drivers |
|---|---|---|---|---|
| Dick Simon Racing | Lola | Cosworth / Buick | Goodyear | Randy Lewis |
| Dick Simon Racing | Lola | Cosworth / Buick | Goodyear | Joe Sposato |
| Doug Shierson Racing | Lola | Judd | Goodyear | Raul Boesel |
| Raynor Racing | Lola | Judd | Goodyear | Derek Daly |
| Machinists Union Racing | March | Cosworth | Goodyear | Kevin Cogan |
| Machinists Union Racing | March | Cosworth | Goodyear | Johnny Rutherford |
| Machinists Union Racing | Lola | Cosworth | Goodyear | Pancho Carter |
| Protofab Racing | Lola | Cosworth | Goodyear | James Weaver |
| Protofab Racing | Lola | Cosworth | Goodyear | John Jones |
| A. J. Foyt Enterprises | Lola | Cosworth | Goodyear | A. J. Foyt |
| A. J. Foyt Enterprises | Lola | Cosworth | Goodyear | Rocky Moran |
| A. J. Foyt Enterprises | March | Cosworth | Goodyear | Rich Vogler |
| Bayside Motorsports | Lola | Cosworth | Goodyear | Dominic Dobson |