The 1991 SCCA Escort World Challenge was the second running of the Sports Car Club of America's World Challenge series. It was the final year under sponsorship from Escort radar detectors. The series would not find another corporate sponsor until television network SpeedVision bought the series in 1999. The race in Mexico would be their final race outside of North America (i.e. the United States and Canada) until their race in Puerto Rico twelve years later. The series also added a Super Sport group alongside its World Challenge and Super Production groups. The series would also adopt a 24-hour race at Mosport Park.
| Round | Circuit | Winning Driver (WC) Winning Driver (SP) Winning Driver (SS) | Winning Vehicle (WC) Winning Vehicle (SP) Winning Vehicle (SS) | |
|---|---|---|---|---|
| 1 |  Sears Point | Shawn Hendricks Mitch Wright / Bo Lemler Did not participate | Chevrolet Corvette Eagle Talon Did not participate | |
| 2 | Dallas | R.K. SmithNorris Raincourt Did not participate | Chevrolet Corvette Honda CRX Si Did not participate | |
| 3 | Des Moines | Shawn HendricksPeter Cunningham Did not participate | Chevrolet Corvette BMW M3 Did not participate | |
| 4 |  Mosport | R.K. Smith / Ken Wallace / Ken Wilden / Richard Spenard / David Empringham / Tommy Clark / Peter Cunningham Mitch Wright / Tommy Archer / Bobby Archer Lou Gigliotti / Leighton Reese / Brad Hoyt / Mark Behm / John Petrick | Chevrolet Corvette Eagle Talon Chevrolet Camaro | |
| 5 | Denver | Doc Bundy Dave Jolly Terry Borcheller | Lotus Esprit Oldsmobile Calais Ford Mustang | |
| 6 | Road America | Bobby CarradineJohannes Van OverbeekDave Jolly | Lotus Esprit Oldsmobile Calais Chevrolet Camaro | |
| 7 | Texas | Bobby CarradinePeter SchwartzottBill Gray / Stu Hayner | Lotus Esprit Honda CRX Chevrolet Camaro | |
| 8 |  Mexico | Boris Said III Tommy Archer Did not participate | Ford Mustang Eagle Talon Did not participate |