The 2005 12 Hours of Sebring was the 53rd running of this event, and took place on March 19, 2005. The race was sponsored by Mobil 1 and was the opening race of the 2005 American Le Mans Series season run by IMSA.

Class winners in bold. Cars failing to complete 70% of winner's distance marked as Not Classified (NC).

Pos	Class	No	Team	Drivers	Chassis	Tyre	Laps
					Engine
1	LMP1	1	ADT Champion Racing	JJ Lehto Marco Werner Tom Kristensen	Audi R8	M	361
					Audi 3.6 L Turbo V8
2	LMP1	2	ADT Champion Racing	Emanuele Pirro Frank Biela Allan McNish	Audi R8	M	361
					Audi 3.6 L Turbo V8
3	LMP1	16	Dyson Racing	James Weaver Andy Wallace Butch Leitzinger	MG-Lola EX257	M	341
					MG (AER) XP20 2.0 L Turbo I4
4	GT1	57	Aston Martin Racing	Darren Turner David Brabham Stéphane Ortelli	Aston Martin DBR9	M	338
					Aston Martin 6.0 L V12
5	GT1	3	Corvette Racing	Ron Fellows Johnny O'Connell Max Papis	Chevrolet Corvette C6.R	M	337
					Chevrolet LS7R 7.0 L V8
6	GT1	4	Corvette Racing	Oliver Gavin Olivier Beretta Jan Magnussen	Chevrolet Corvette C6.R	M	323
					Chevrolet LS7R 7.0 L V8
7	GT2	31	Petersen Motorsports White Lightning Racing	Lucas Luhr Jörg Bergmeister Patrick Long	Porsche 911 GT3-RSR	M	321
					Porsche 3.6 L Flat-6
8	GT1	63	ACEMCO Motorsports	Johnny Mowlem Terry Borcheller Ralf Kelleners	Saleen S7-R	M	318
					Ford 7.0 L V8
9	GT1	35	Maserati Corse Risi Competizione	Andrea Bertolini Fabio Babini Fabrizio de Simone	Maserati MC12	P	316
					Maserati 6.0 L V12
10	GT1	5	Pacific Coast Motorsports	Ryan Dalziel Alex Figge David Empringham	Chevrolet Corvette C5-R	Y	315
					Chevrolet LS7R 7.0 L V8
11	GT2	79	J3 Racing	Tim Sugden Niclas Jönsson	Porsche 911 GT3-RSR	P	314
					Porsche 3.6 L Flat-6
12	LMP2	10	Miracle Motorsports	Jeff Bucknum Chris McMurry Ian James	Courage C65	K	311
					AER P07 2.0 L Turbo I4
13	GT2	45	Flying Lizard Motorsports	Jon Fogarty Johannes van Overbeek Darren Law	Porsche 911 GT3-RSR	M	311
					Porsche 3.6 L Flat-6
14	GT1	71	Carsport America	Jean-Philippe Belloc Michele Rugolo Tom Weickardt	Dodge Viper GTS-R	P	310
					Dodge 8.0 L V10
15	GT1	58	Aston Martin Racing	Peter Kox Pedro Lamy Stéphane Sarrazin	Aston Martin DBR9	M	303
					Aston Martin 6.0 L V12
16	GT2	66	TRG	Tracy Krohn Michael Cawley Marc Sluszny	Porsche 911 GT3-RSR	M	297
					Porsche 3.6 L Flat-6
17	GT2	96	IN2 Racing	Michael Vergers Juan Barazi Andrew Thompson	Porsche 911 GT3-RSR	D	278
					Porsche 3.6 L Flat-6
18	GT2	34	ZIP Racing	Spencer Pumpelly Andy Lally Steven Ivankovich	Porsche 911 GT3-R	P	275
					Porsche 3.6 L Flat-6
19 DNF	LMP1	20	Dyson Racing	Chris Dyson Guy Smith	MG-Lola EX257	M	264
					MG (AER) XP20 2.0L Turbo I4
20 NC	GT2	51	Panoz Motor Sports	Gunnar Jeannette Bryan Sellers Scott Maxwell	Panoz Esperante GT-LM	P	239
					Ford (Elan) 5.0 L V8
21 DNF	LMP2	27	Kruse Motorsport	Ian Mitchell Phillip Bennett Harold Primat	Courage C65	P	238
					Judd XV675 3.4 L V8
22 DNF	GT2	43	BAM!	Mike Rockenfeller Martin Jensen Tony Burgess	Porsche 911 GT3-RSR	Y	207
					Porsche 3.6 L Flat-6
23 DNF	LMP1	12	Autocon Motorsports	Michael Lewis Tomy Drissi Bryan Willman	Riley & Scott Mk III C	D	202
					Elan 6L8 6.0 L V8
24 DNF	LMP2	37	Telesis Intersport Racing	Jon Field Duncan Dayton Gregor Fisken	Lola B05/40	G	166
					AER P07 2.0 L Turbo I4
25 DNF	GT1	83	Graham Nash Motorsport	Nigel Smith Ricky Cole Rick Sutherland	Saleen S7-R	P	159
					Ford 7.0 L V8
26 DNF	GT2	41	Team LNT	Richard Dean Patrick Pearce Marc Hynes	TVR Tuscan T400R	D	157
					TVR Speed Six 4.0 L I6
27 DNF	GT1	86	Larbre Compétition	Christophe Bouchut Fabrizio Gollin Sébastien Bourdais	Ferrari 550-GTS Maranello	M	155
					Ferrari 5.9 L V12
28 DNF	GT2	40	Team LNT	Jonny Kane Warren Hughes Lawrence Tomlinson	TVR Tuscan T400R	D	136
					TVR Speed Six 4.0 L I6
29 DNF	LMP1	88	Rollcentre Racing	João Barbosa Didier Theys Michael Krumm	Dallara SP1	M	130
					Nissan 3.6 L Turbo V8
30 DNF	GT2	50	Panoz Motor Sports	Bill Auberlen Robin Liddell Emanuele Naspetti	Panoz Esperante GT-LM	P	121
					Ford (Elan) 5.0 L V8
31 DNF	GT2	48	Spyker Squadron	Tom Coronel Donny Crevels Marc Goossens	Spyker C8 Spyder GT2-R	D	121
					Audi (Mader) 3.8 L V8
32 DNF	GT2	23	Alex Job Racing	Timo Bernhard Sascha Maassen Romain Dumas	Porsche 911 GT3-RSR	M	98
					Porsche 3.6 L Flat-6
33 DNF	LMP2	30	Telesis Intersport Racing	Clint Field Liz Halliday Gareth Ridpath	Lola B2K/40	P	62
					Judd XV675 3.4 L V8
34 DNF	GT2	24	Alex Job Racing	Randy Pobst Ian Baas Brian Cunningham	Porsche 911 GT3-RSR	M	62
					Porsche 3.6 L Flat-6
35 DNF	GT2	44	Flying Lizard Motorsports	Lonnie Pechnik David Murry Seth Neiman	Porsche 911 GT3-RSR	M	46
					Porsche 3.6 L Flat-6
36 DNF	GT2	67	TRG	Pierre Ehret Kevin Buckler Andrew Davis	Porsche 911 GT3-RSR	M	21
					Porsche 3.6 L Flat-6
37 DNF	GT2	47	Spyker Squadron	Peter van Merksteijn Frans Munsterhuis Marino Franchitti	Spyker C8 Spyder GT2-R	D	18
					Audi (Mader) 3.8 L V8
38 DNF	LMP2	15	Binnie Motorsports	William Binnie Robert Julien Adam Sharpe	Lola B05/40	P	11
					Nicholson-McLaren 3.3 L V8

• Pole Position - #1 ADT Champion Racing - Grid set by combined practice times
• Fastest Lap - #1 ADT Champion Racing - 1:48.580
• Distance - 1,335.7 miles (2,149.6 km)
• Average Speed - 111.028 mph (178.682 km/h)

• "Official Results" (PDF). Archived from the original (PDF) on 2012-10-20. Retrieved 2006-10-30. (308 KiB)