The 2013 Trans-Am Series was the 45th running of the Sports Car Club of America's Trans-Am Series.

The GGT class of the previous year was replaced by the TA3 class. The TA3 class was later broken into two groups TA3-International, based on SCCA GT2 rules, and TA3-American Muscle, based on NASA American Iron Racing class rules, with year and model restrictions.^[1]

Source:^[2]

Round	Circuit	Date	TA Winning driver	TA Winning vehicle	TA2 Winning driver	TA2 Winning vehicle	TA3 Winning driver	TA3 Winning vehicle
1	Sebring International Raceway	March 3	Doug Peterson	Chevrolet Corvette	Cameron Lawrence	Chevrolet Camaro	C. David Seuss	Porsche 996
2	Canadian Tire Motorsport Park	May 19	Doug Peterson	Chevrolet Corvette	Tony Buffomante	Chevrolet Camaro	Chuck Cassaro	Ford Mustang
3	Lime Rock Park	May 25	Paul Fix	Chevrolet Corvette	Bob Stretch	Chevrolet Camaro	C. David Seuss	Porsche 996
4	Watkins Glen International	June 9	Doug Peterson	Chevrolet Corvette	Cameron Lawrence	Chevrolet Camaro	C. David Seuss	Porsche 996
5	Road America	June 21	Doug Peterson	Chevrolet Corvette	Cameron Lawrence	Chevrolet Camaro	Chuck Cassaro	Ford Mustang
6	Mid-Ohio Sports Car Course	August 17	Cliff Ebben	Ford Mustang	Cameron Lawrence	Chevrolet Camaro	Todd Napieralski	Chevrolet Camaro
7	Brainerd International Raceway	September 1	Doug Peterson	Chevrolet Corvette	Cameron Lawrence	Chevrolet Camaro	C. David Seuss	Porsche 996
8	Virginia International Raceway	September 29	Simon Gregg	Chevrolet Corvette	Cameron Lawrence	Chevrolet Camaro	Steve Kent Jr.	Ford Mustang
9	Road Atlanta	November 3	Tony Ave	Chevrolet Corvette	Cameron Lawrence	Chevrolet Camaro	Todd Napieralski	Chevrolet Camaro
10	Daytona International Speedway	November 17	Doug Peterson	Chevrolet Corvette	Cameron Lawrence	Chevrolet Camaro	Steve Kent Jr.	Ford Mustang

On December 21, 2012, Trans Am announced that the Ford Mustang would be added to the TA2 class, first introduced in 2010.^[2]

Pos	Driver	Car	Starts	Points
1	Doug Peterson	Chevrolet Corvette	10	188
2	Simon Gregg	Chevrolet Corvette	10	138
3	Cliff Ebben	Ford Mustang	10	135
4	Amy Ruman	Chevrolet Corvette	10	87
5	Tony Ave	Chevrolet Corvette	5	79
6	David Pintaric	Chevrolet Corvette	9	67
7	Paul Fix	Chevrolet Corvette	4	58
8	Allan Lewis	Chevrolet Corvette	5	42
9	John Baucom	Ford Mustang	6	41
10	Denny Lamers	Ford Mustang	5	38
11	Jim McAleese	Chevrolet Corvette	3	32
12	Kenny Bupp	Chevrolet Corvette	4	32
13	Rick Dittman	Chevrolet Corvette	3	25
14	Charles Wicht	Chevrolet Corvette	2	24
15	Jordan Bupp	Chevrolet Corvette	3	22
16	Kyle Kelley	Chevrolet Corvette	2	18
17	Andrew Romocki	Chevrolet Corvette	2	17
18	Mike Skeen	Jaguar XKR	1	16
19	Bob Monette	Jaguar XKR	2	15
20	Tomy Drissi	Chevrolet Corvette	1	14
21	Kerry Hitt	Chevrolet Corvette	3	12
22	Jed Copham	Chevrolet Corvette	1	11
23	David Fershtand	Chevrolet Corvette	1	11
24	Jim Peruto	Chevrolet Corvette	2	10
25	Ted Sullivan	Chevrolet Camaro	1	9
26	Blaise Csida	Chevrolet Corvette	1	9
27	Richard Grant	Chevrolet Corvette	1	8
28	Tim Rubright	Ford Mustang	1	2
29	Jon Leavy	Chevrolet Camaro	1	1

Pos	Driver	Car	Starts	Points
1	Cameron Lawrence	Chevrolet Camaro	10	210
2	Bob Stretch	Chevrolet Camaro	9	104
3	Gregg Rodgers	Chevrolet Camaro	10	99
4	Kurt Roehrig	Chevrolet Camaro	10	88
5	Bob Stretch	Chevrolet Camaro/Ford Mustang	9	85
6	Robert Huffmaster	Chevrolet Camaro	8	78
7	Pete Halsmer	Chevrolet Camaro	7	78
8	Scott Ferguson	Pontiac GTO	9	69
9	Tom Sheehan	Chevrolet Camaro	10	67
10	Dale Madsen	Ford Mustang	10	57
11	Mel Shaw	Chevrolet Camaro	10	50
12	Mike McGahern	Chevrolet Camaro	4	41
13	John Atwell	Chevrolet Camaro	5	37
14	Michael Wilson	Chevrolet Monte Carlo	5	33
16	Tony Buffomante	Chevrolet Camaro	1	23
17	Joe Sturm	Chevrolet Camaro	3	20
18	Kenneth Liesfield	Chevrolet Camaro	2	20
19	Britt Casey	Chevrolet Camaro	2	17
20	Ron Keith	Chevrolet Camaro	1	12
21	Adam Andretti	Chevrolet Camaro	3	12
22	Kevin Poitras	Chevrolet Camaro	1	11
23	Mary Wright	Chevrolet Camaro	2	10
24	Allen Milarcik	Chevrolet Camaro	1	10
25	Bill Prietzel	Chevrolet Monte Carlo	1	7
26	Seth Duval	Ford Mustang	1	7
27	Kenneth Quartuccio	Chevrolet Camaro	1	6
28	Geoff Fane	Chevrolet Camaro	1	1
29	Ricky Sanders	Chevrolet Monte Carlo	1	1
30	Mike Miller	Chevrolet Camaro	1	1
31	James Winslow	Chevrolet Camaro	1	1
32	A. J. Henriksen	Chevrolet Camaro	1	1
33	Martin Barkey	Chevrolet Camaro	1	1

Pos	Driver	Car	Starts	Points
1	David Seuss	Porsche 996 GT3	7	156
2	Tim Gray	Porsche 996 GT3	6	107
3	Mickey Mills	BMW M3	4	57

Pos	Driver	Car	Starts	Points
1	Chuck Cassaro	Ford Mustang	9	127
2	Rob Bodle	Ford Mustang	8	101
3	Steve Kent Jr.	Ford Mustang	5	99
4	Rich Jones	Ford Mustang	4	61
5	Todd Napieralski	Chevrolet Camaro	3	49
6	Robert Korzen	Ford Mustang	3	36
7	Dane Moxlow	Ford Mustang	1	19
8	Ernie Francis Jr.	Chevrolet Camaro	1	19
9	Richard Golinello	Ford Mustang	1	5