The 2005 season of the NASCAR Busch Series began with the Hershey's Take 5 300 at Daytona International Speedway and concluded with the Ford 300 at Homestead-Miami Speedway. Martin Truex Jr. of Chance 2 Motorsports was crowned champion for the second consecutive year.
The year saw at least two significant changes:

• The top 30 teams in the previous season's owner points, provided that they attempted all races that season, were guaranteed starting spots in the first five races of 2005. However, only 26 teams met the criteria, so for those races additional spots were available for teams having to qualify on time. After the fifth race, the top 30 teams received the guaranteed starting spots.
• The series ran on the Autódromo Hermanos Rodríguez road course in Mexico City in March. It was the first Busch Series race conducted outside the United States. http://en.wikipedia.org/wiki/2005_NASCAR_Busch_Series.

Race Results:

#	Date	Site	Cars	Winner(s)	St	Make / Model	Pole	Cau	Laps	Speed	LC
1	2/19/2005	Daytona	43	Tony Stewart	14	Chevrolet	182.452	5	16	150.021	13
2	2/26/2005	Fontana	43	Mark Martin	3	Ford	185.941	8	43	117.251	14
3	3/6/2005	Mexico City	43	Martin Truex, Jr.	3	Chevrolet	103.366	8	22	67.591	7
4	3/12/2005	Las Vegas	43	Mark Martin	25	Ford	170.951	8	31	122.158	15
5	3/19/2005	Atlanta	43	Carl Edwards	1	Ford	191.364	8	39	130.651	20
6	3/26/2005	Nashville	43	Reed Sorenson	1	Dodge	165.928	7	34	124.436	6
7	4/4/2005	Bristol	43	Kevin Harvick	38	Chevrolet	NTT	14	102	59.534	10
8	4/16/2005	Fort Worth	43	Kasey Kahne	25	Dodge	189.84	9	37	126.746	17
9	4/22/2005	Phoenix	43	Greg Biffle	20	Ford	132.091	14	67	83.007	7
10	4/30/2005	Talladega	43	Martin Truex, Jr.	4	Chevrolet	184.023	10	41	122.117	19
11	5/6/2005	Darlington	43	Matt Kenseth	24	Ford	168.186	6	32	116.238	11
12	5/13/2005	Richmond	43	Carl Edwards	5	Ford	128.977	13	66	85.709	10
13	5/28/2005	Charlotte	43	Kyle Busch	19	Chevrolet	186.735	11	49	117.968	13
14	6/4/2005	Dover	43	Martin Truex, Jr.	5	Chevrolet	NTT	9	47	97.258	10
15	6/12/2005	Nashville	43	Clint Bowyer	5	Chevrolet	NTT	8	37	122.141	14
16	6/18/2005	Kentucky	43	Carl Edwards	1	Ford	181.287	10	44	117.111	12
17	6/25/2005	Milwaukee	43	Johnny Sauter	1	Dodge	122.595	5	20	97.403	4
18	7/1/2005	Daytona	43	Martin Truex, Jr.	6	Chevrolet	182.515	5	19	140.141	13
19	7/9/2005	Chicago	43	Kevin Harvick	5	Chevrolet	186.438	7	32	130.34	15
20	7/16/2005	Loudon	43	Martin Truex, Jr.	7	Chevrolet	130.336	13	49	92.093	6
21	7/23/2005	Pikes Peak	43	David Green	14	Ford	133.611	5	26	109.21	7
22	7/30/2005	Gateway	43	Reed Sorenson	2	Dodge	135.022	7	36	103.318	10
23	8/6/2005	IRP	43	Martin Truex, Jr.	9	Chevrolet	110.943	6	49	72.93	5
24	8/13/2005	Watkins Glen	43	Ryan Newman	4	Dodge	121.069	7	32	71.686	7
25	8/20/2005	Michigan	43	Ryan Newman	38	Dodge	NTT	5	21	136.986	13
26	8/26/2005	Bristol	43	Ryan Newman	3	Dodge	125.404	12	100	58.81	5
27	9/3/2005	Fontana	43	Carl Edwards	4	Ford	181.333	5	22	139.104	12
28	9/9/2005	Richmond	43	Kevin Harvick	8	Chevrolet	127.239	11	63	88.634	9
29	9/24/2005	Dover	43	Ryan Newman	1	Dodge	156.42	3	21	115.644	8
30	10/8/2005	Kansas	43	Kasey Kahne	4	Dodge	178.938	10	44	117.328	13
31	10/14/2005	Charlotte	43	Ryan Newman	2	Dodge	187.735	14	67	102.506	13
32	10/22/2005	Memphis	43	Clint Bowyer	35	Chevrolet	119.867	15	81	73.473	12
33	11/5/2005	Fort Worth	43	Kevin Harvick	3	Chevrolet	189.5	7	26	138.019	9
34	11/12/2005	Phoenix	43	Carl Edwards	1	Ford	133.151	6	36	97.893	6
35	11/19/2005	Homestead	43	Ryan Newman	1	Dodge	174.548	9	34	124.41	14