De 24 uur van Daytona 1991 was de 29e editie van deze endurancerace. De race werd verreden op 2 en 3 februari 1991 op de Daytona International Speedway nabij Daytona Beach, Florida.
De race werd gewonnen door de Joest Racing #7 van Frank Jelinski, Henri Pescarolo, Hurley Haywood, Bob Wollek en Louis Krages. Het was de vijfde Daytona-zege voor Haywood, die hiermee het record van Peter Gregg, Pedro Rodríguez de la Vega en Rolf Stommelen wist te verbreken. Wollek behaalde zijn vierde overwinning en kwam op gelijke hoogte met deze drie coureurs. Voor Jelinski, Pescarolo en Krages was het hun eerste zege. De LM-klasse werd gewonnen door de Nissan Performance Technology #85 van Bob Earl, Derek Daly, Chip Robinson en Geoff Brabham. De GTO-klasse werd gewonnen door de Roush Racing #15 van Mark Martin, Wally Dallenbach jr. en Robby Gordon. De Lights-klasse werd gewonnen door de Acura #48 van Parker Johnstone, Steve Cameron, Doug Peterson en Bob Lesnett. De GTU-klasse werd gewonnen door de Greer Racing #82 van Dick Greer, Al Bacon, Mike Mees en Peter Uria.
Race Winnaars in hun klasse zijn vetgedrukt.
Pos. Klasse No. Team Coureurs Chassis Banden Ronden Motor 1 GTP 7 Joest Racing Frank Jelinski Henri Pescarolo Hurley Haywood Bob Wollek Louis Krages Porsche 962 719 Porsche 3.0L Flat 6 Twin-Turbo 2 LM 83 Nissan Performance Technology Bob Earl Derek Daly Chip Robinson Geoff Brabham Nissan R90CK 701 Nissan 3.5L V8 Twin-Turbo 3 GTP 10 Wynn's Chris Cord John Hotchkis Jim Adams Rob Dyson Porsche 962 692 Porsche 3.0L Flat 6 Twin-Turbo 4 GTO 15 Roush Racing Mark Martin Wally Dallenbach jr. Robby Gordon Ford Mustang 672 Ford 6.0L V8 DNF GTP 00 Jochen Dauer Racing Michael Andretti Mario Andretti Jeff Andretti Porsche 962 663 Porsche 3.0L Flat 6 Twin-Turbo 6 GTO 12 Whistler Radar John Fergus Max Jones Dorsey Schroeder Ford Mustang 658 Ford 6.0L V8 DNF Lights 48 Acura Parker Johnstone Steve Cameron Doug Peterson Bob Lesnett Spice SE90P 654 Acura 3.0L V6 8 Lights 36 Ecurie Scientific John Grooms Michael Greenfield Frank Jellinek Peter Greenfield Kudzu DG-1 632 Mazda 1.3L Rotary DNF Lights 54 HDF Motorsport Michael Dow Andrew Hepworth Hendrik ten Cate Spice SE89P 620 Buick 3.0L V6 10 GTO 90 Roush Racing Jim Stevens Craig Bennett Tom Grunnah Jim Jaeger Ford Mustang 619 Ford 6.0L V8 11 GTP 4 Tom Milner Racing Brian Bonner Derrike Cope Jeff Kline Scott Sharp Spice SE89P 611 Chevrolet 6.0L V8 12 GTO 92 EDS/Mobil/Goodyear R. K. Smith Andy Pilgrim Doc Bundy Joe Varde Chevrolet Corvette ZR-1 611 Chevrolet LT5 5.7L V8 13 GTU 82 Greer Racing Dick Greer Al Bacon Mike Mees Peter Uria Mazda RX-7 605 Mazda 2.6L 2 Rotor 14 GTO 63 Mazda Motorsports Brian Redman John O'Steen Price Cobb Pete Halsmer Mazda RX-7 576 Mazda 3.1L 4 Rotor 15 GTU 37 Botero Racing Honorato Espinosa Rob Wilson Miguel Morejon Felipe Solano Mazda MX-6 576 Mazda 2.6L 2 Rotor 16 GTU 38 Mandeville Auto Tech Roger Mandeville Amos Johnson Kelly Marsh Mazda RX-7 568 Mazda 2.6L 2 Rotor 17 Lights 42 Intersport Geoff Nicol David Tennyson Todd Brayton Tiga GT286 556 Mazda 1.3L Rotary 18 Lights 09 R. J. Racing Stephen Hynes Tommy Johnson Rob Robertson John Sheldon Tiga GC287 545 Buick 3.0L V6 19 GTU 26 Border Cantina Chris Craft Alex Job Joe Pezza Jack Refenning Porsche 911 494 Porsche 3.2L Flat 6 DNF LM 84 Nissan Performance Technology Julian Bailey Steve Millen Arie Luyendyk Jeremy Dale Nissan R90CK 472 Nissan 3.5L V8 Twin-Turbo 21 GTO 91 EDS/Mobil/Goodyear Stu Hayner Don Knowles John Heinricy Scott Lagasse Tommy Morrison Chevrolet Corvette ZR-1 464 Chevrolet LT5 6.0L V8 DNF GTP 16 Dyson Racing James Weaver John Paul jr. Tiff Needell Porsche 962 450 Porsche 3.0L Flat 6 Twin-Turbo 23 GTU 72 Jay Kjoller Motorsports Steve Volk Jay Kjoller Patrick Mooney Porsche 911 449 Porsche 3.2L Flat 6 DNF GTP 5 Tom Milner Racing Mike Brockman Tim McAdam Fred Phillips Jeff Davis Spice SE89P 448 Chevrolet 6.0L V8 25 GTO 70 M/J Engineering Lou Gigiliotti Boris Said Mike Nolan Roger Schramm Peter Cunningham Oldsmobile Cutlass 445 Oldsmobile 6.0L V8 DNF GTU 66 North Coast Racing Leighton Reese Mike Gagliardo Brad Hoyt Mazda RX-7 442 Mazda 2.6L 2 Rotor 27 GTO 11 Robert Williams Jon Gooding John Annis Mark Kennedy Nort Northam Tom Panaggio Chevrolet Camaro 427 Chevrolet 6.0L V8 DNF GTP 98 All American Racers Mark Dismore Rocky Moran P.J. Jones Eagle HF89 408 Toyota 2.1L I4 Turbo 29 GTO 87 A&R Auto Electric Grant Hill Nick Holmes Anthony Puleo Daniel Urrutia Chevrolet Camaro 396 Chevrolet 6.0L V8 DNF GTP 2 Bud Light Jaguar Racing Davy Jones Scott Pruett Raul Boesel Derek Warwick Jaguar XJR-12 379 Jaguar 6.5L V12 DNF GTP 6 Joest Racing Bob Wollek Bernd Schneider Paolo Barilla Massimo Sigala Porsche 962 360 Porsche 3.0L Flat 6 Twin-Turbo DNF Lights 9 Essex Racing Jim Pace Tom Hessert jr. Charles Morgan Kudzu DG-1 359 Buick 3.0L V6 DNF Lights 20 Carlos Bobeda Racing Kaming Ko Mike Sheehan Ron McKay Charles Monk Tiga GT287 328 Chevrolet 3.0L V6 34 GTO 45 First Coast Trucks John Forbes Ken Fengler Bob Hundredmark Tom Curren Chevrolet Corvette 315 Chevrolet 6.0L V8 DNF GTP 0 Jochen Dauer Racing Al Unser jr. Bobby Unser Robby Unser Al Unser sr. Porsche 962 270 Porsche 3.0L Flat 6 Twin-Turbo DNF GTO 28 Del Russo Taylor Don Arpin Jon Olch Tim Banks Scott Watkins Chevrolet Camaro 234 Chevrolet 6.0L V8 DNF GTO 53 Hi-Tech Coating Richard McDill Bill McDill Jim Burt Chevrolet Camaro 223 Chevrolet 6.0L V8 DNF GTU 96 Fastcolor Auto Art Chuck Kurtz Bob Leitzinger David Loring Don Reynolds Nissan 240SX 192 Nissan 2.8L V6 DNF GTU 57 Kryder Racing Henry Camferdam Phil Krueger Alistair Oag Reed Kryder Nissan 240SX 159 Nissan 2.8L V6 40 GTP 60 Gunnar Porsche Jay Cochran Derek Bell Justin Bell Gunnar 966 83 Porsche 3.0L Flat 6 Twin-Turbo 41 GTO 04 Henry Brosnaham Bobby Scolo Steve Burgner John Macaluso Chevrolet Camaro 78 Chevrolet 6.0L V8 DNF GTP 99 All American Racers Juan Manuel Fangio II Willy T. Ribbs Andy Wallace Eagle HF89 60 Toyota 2.1L I4 Turbo DNF GTO 62 Mazda Motorsports John Morton Calvin Fish Pete Halsmer Mazda RX-7 50 Mazda 3.1L 4 Rotor DNF LM 1 Nissan Performance Technology Arie Luyendyk Julian Bailey Derek Daly Nissan R90CK 47 Nissan 3.5L V8 Twin-Turbo DNF GTO 06 Overbagh Motor Racing Oma Kimbrough Hoyt Overbagh Mark Montgomery Kent Painter Chevrolet Camaro 37 Chevrolet 6.0L V8 DNF GTU 95 Fastcolor Auto Art Butch Leitzinger David Loring Chuck Kurtz Bob Leitzinger Nissan 240SX 13 Nissan 2.8L V6 DNS GTP 3 Bud Light Jaguar Racing John Nielsen Jaguar XJR-12 0 Jaguar 6.5L V12
1991 Daytona