The 2003 Road America 500 was the sixth race of the 2003 American Le Mans Series season. It took place at Road America, Wisconsin on August 24, 2003.

Class winners in bold. Cars failing to complete 75% of winner's distance marked as Not Classified (NC).

Pos	Class	No	Team	Drivers	Chassis	Tyre	Laps
					Engine
1	LMP900	38	ADT Champion Racing	Johnny Herbert JJ Lehto	Audi R8	M	79
					Audi 3.6L Turbo V8
2	LMP675	20	Dyson Racing	Chris Dyson Andy Wallace	MG-Lola EX257	G	78
					MG (AER) XP20 2.0L Turbo I4
3	LMP900	10	JML Team Panoz	Olivier Beretta David Saelens	Panoz LMP01 Evo	M	78
					Élan 6L8 6.0L V8
4	GTS	80	Prodrive	David Brabham Jan Magnussen	Ferrari 550-GTS Maranello	M	75
					Ferrari 5.9L V12
5	GTS	3	Corvette Racing	Ron Fellows Johnny O'Connell	Chevrolet Corvette C5-R	G	75
					Chevrolet 7.0L V8
6	GTS	88	Prodrive	Tomáš Enge Peter Kox	Ferrari 550-GTS Maranello	M	74
					Ferrari 5.9L V12
7	LMP900	1	Infineon Team Joest	Marco Werner Frank Biela	Audi R8	M	73
					Audi 3.6L Turbo V8
8	GTS	0	Team Olive Garden	Emanuele Naspetti Mimmo Schiattarella	Ferrari 550 Maranello	P	73
					Ferrari 6.0L V12
9	GTS	4	Corvette Racing	Kelly Collins Oliver Gavin	Chevrolet Corvette C5-R	G	73
					Chevrolet 7.0L V8
10	LMP900	11	JML Team Panoz	Benjamin Leuenberger Gunnar Jeannette	Panoz LMP01 Evo	M	73
					Élan 6L8 6.0L V8
11	GTS	2	Konrad Motorsport	Franz Konrad Wolfgang Kaufmann	Saleen S7-R	D	73
					Ford 7.0L V8
12	LMP900	30	Intersport Racing	Clint Field Rick Sutherland	Riley & Scott Mk III C	D	72
					Élan 6L8 6.0L V8
13	GT	31	Petersen Motorsports White Lightning Racing	Craig Stanton Johnny Mowlem	Porsche 911 GT3-RS	M	72
					Porsche 3.6L Flat-6
14	LMP900	12	American Spirit Racing	Michael Lewis Tomy Drissi	Riley & Scott Mk III C	D	72
					Lincoln (Élan) 5.0L V8
15	GT	66	The Racer's Group	Kevin Buckler Cort Wagner	Porsche 911 GT3-RS	M	71
					Porsche 3.6L Flat-6
16	GT	33	ZIP Racing	Andy Lally Spencer Pumpelly	Porsche 911 GT3-RS	D	71
					Porsche 3.6L Flat-6
17	GT	23	Alex Job Racing	Lucas Luhr Sascha Maassen	Porsche 911 GT3-RS	M	71
					Porsche 3.6L Flat-6
18	GT	67	The Racer's Group	Michael Schrom Pierre Ehret	Porsche 911 GT3-RS	M	70
					Porsche 3.6L Flat-6
19	GT	52	Seikel Motorsport	Philip Collin John Lloyd	Porsche 911 GT3-RS	Y	70
					Porsche 3.6L Flat-6
20	GT	68	The Racer's Group	Marc Bunting Chris Gleason	Porsche 911 GT3-RS	M	70
					Porsche 3.6L Flat-6
21	GT	63	ACEMCO Motorsports	Terry Borcheller Shane Lewis	Ferrari 360 Modena GTC	Y	69
					Ferrari 3.6L V8
22	GT	79	J3 Racing	David Murry Justin Jackson	Porsche 911 GT3-RS	M	69
					Porsche 3.6L Flat-6
23	GT	61	P.K. Sport	Piers Masarati Vic Rice	Porsche 911 GT3-R	P	69
					Porsche 3.6L Flat-6
24	GT	42	Orbit Racing	Leo Hindery Joe Policastro Joe Policastro Jr.	Porsche 911 GT3-RS	M	68
					Porsche 3.6L Flat-6
25	LMP675	18	Essex Racing	James Gue Jason Workman	Lola B2K/40	P	68
					Nissan (AER) VQL 3.0L V6
26	LMP675	64	Downing Atlanta Inc.	Jim Downing Howart Katz	WR LMP-02	D	67
					Mazda R26B 2.6L 4-Rotor
27	GTS	17	Carsport America	Tom Weickardt Joe Ellis Romeo Kapudija	Dodge Viper GTS-R	P	64
					Dodge 8.0L V8
28	LMP675	37	Intersport Racing	Jon Field Duncan Dayton	MG-Lola EX257	G	60
					MG (AER) XP20 2.0L Turbo I4
29	LMP675	56	Team Bucknum Racing	Jeff Bucknum Bryan Willman Chris McMurry	Pilbeam MP91	D	59
					Willman (JPX) 3.4L V6
30 DNF	GT	35	Risi Competizione	Anthony Lazzaro Ralf Kelleners	Ferrari 360 Modena GTC	M	57
					Ferrari 3.6L V8
31 NC	GT	24	Alex Job Racing	Jörg Bergmeister Timo Bernhard	Porsche 911 GT3-RS	M	57
					Porsche 3.6L Flat-6
32 DNF	GT	60	P.K. Sport	Robin Liddell Alex Davison	Porsche 911 GT3-RS	P	51
					Porsche 3.6L Flat-6
33 DNF	GT	43	Orbit Racing	Marc Lieb Peter Baron	Porsche 911 GT3-RS	M	37
					Porsche 3.6L Flat-6
34 DNF	GT	29	JMB Racing USA	Peter Kutemann Philip Shearer	Ferrari 360 Modena GTC	P	26
					Ferrari 3.6L V8
35 DNF	GT	28	JMB Racing USA	Stéphane Grégoire Iradj Alexander	Ferrari 360 Modena GTC	P	26
					Ferrari 3.6L V8
36 DNF	LMP675	16	Dyson Racing	Butch Leitzinger James Weaver	MG-Lola EX257	G	8
					MG (AER) XP20 2.0L Turbo I4
DNS	GTS	71	Carsport America	Jeff Altenburg Jean-Philippe Belloc	Dodge Viper GTS-R	P	-
					Dodge 8.0L V10

• Pole Position - #1 Infineon Team Joest - 1:52.265
• Fastest Lap - #1 Infineon Team Joest - 1:54.613
• Distance - 514.655 km
• Average Speed - 185.623 km/h

• "Official Results" (PDF). Archived from the original (PDF) on February 10, 2012. Retrieved October 21, 2007. (30.3 KiB)
• Race Results