The 2005 Turkish motorcycle Grand Prix was the penultimate round of the 2005 MotoGP Championship. It took place on the weekend of 21st-23rd October, 2005 at the Istanbul Park circuit.

MotoGP classification

Pos	Rider	Manufacturer	Time/Retired	Grid	Points
1	Marco Melandri	Honda	41:44.139	2	25
2	Valentino Rossi	Yamaha	+1.513	4	20
3	Nicky Hayden	Honda	+6.873	3	16
4	Sete Gibernau	Honda	+12.420	1	13
5	Carlos Checa	Ducati	+26.963	9	11
6	Toni Elias	Yamaha	+29.105	6	10
7	Colin Edwards	Yamaha	+29.255	5	9
8	Makoto Tamada	Honda	+33.345	7	8
9	Alex Barros	Honda	+33.790	8	7
10	Shinya Nakano	Kawasaki	+44.225	10	6
11	Chris Vermeulen	Honda	+46.099	11	5
12	Max Biaggi	Honda	+50.184	12	4
13	Olivier Jacque	Kawasaki	+56.766	13	3
14	Ruben Xaus	Yamaha	+1:01.360	16	2
15	John Hopkins	Suzuki	+1:03.391	14	1
16	Roberto Rolfo	Ducati	+1:17.654	17
17	Franco Battaini	Blata	+1 Lap	19
18	James Ellison	Blata	+1 Lap	18
Ret	Shinichi Itoh	Ducati	Retirement	15

250cc classification

Pos	Rider	Manufacturer	Time/Retired	Grid	Points
1	Casey Stoner	Aprilia	39:28.243	2	25
2	Dani Pedrosa	Honda	+0.093	4	20
3	Hiroshi Aoyama	Honda	+11.647	3	16
4	Jorge Lorenzo	Honda	+21.861	7	13
5	Andrea Dovizioso	Honda	+21.940	8	11
6	Hector Barbera	Honda	+22.258	6	10
7	Alex de Angelis	Aprilia	+43.755	1	9
8	Roberto Locatelli	Aprilia	+44.105	9	8
9	Sylvain Guintoli	Aprilia	+48.918	13	7
10	Chaz Davies	Aprilia	+54.376	17	6
11	Alex Baldolini	Aprilia	+54.651	16	5
12	Alex Debón	Honda	+59.791	12	4
13	Andrea Ballerini	Aprilia	+1:00.082	22	3
14	Mirko Giansanti	Aprilia	+1:00.225	23	2
15	Jakub Smrž	Honda	+1:00.338	19	1
16	Dirk Heidolf	Honda	+1:28.084	21
17	Mathieu Gines	Aprilia	+1:34.665	25
18	Arturo Tizon	Honda	+1:45.487	24
19	Erwan Nigon	Aprilia	+1 Lap	26
20	Zheng Peng Li	Aprilia	+1 Lap	28
21	Nicklas Cajback	Yamaha	+1 Lap	30
Ret	Yuki Takahashi	Honda	Retirement	11
Ret	Arnaud Vincent	Fantic	Retirement	27
Ret	Zhu Wang	Aprilia	Retirement	29
Ret	Simone Corsi	Aprilia	Retirement	15
Ret	Martin Cardenas	Aprilia	Retirement	18
Ret	Taro Sekiguchi	Aprilia	Retirement	20
Ret	Steve Jenkner	Aprilia	Retirement	14
Ret	Sebastian Porto	Aprilia	Retirement	5
Ret	Randy de Puniet	Aprilia	Retirement	10

125cc classification

Pos	Rider	Manufacturer	Time/Retired	Grid	Points
1	Mike di Meglio	Honda	39:50.377	6	25
2	Mattia Pasini	Aprilia	+0.105	4	20
3	Tomoyoshi Koyama	Honda	+0.156	7	16
4	Gabor Talmacsi	KTM	+0.271	8	13
5	Thomas Lüthi	Honda	+0.417	1	11
6	Marco Simoncelli	Aprilia	+5.752	9	10
7	Fabrizio Lai	Honda	+6.148	11	9
8	Angel Rodríguez	Honda	+6.294	15	8
9	Joan Olive	Aprilia	+6.611	14	7
10	Andrea Iannone	Aprilia	+17.119	21	6
11	Manuel Poggiali	Gilera	+17.554	17	5
12	Alvaro Bautista	Honda	+21.232	16	4
13	Lukas Pesek	Derbi	+21.466	10	3
14	Sandro Cortese	Honda	+42.207	25	2
15	Dario Giuseppetti	Aprilia	+42.798	26	1
16	Nicolas Terol	Derbi	+47.875	19
17	Aleix Espargaro	Honda	+47.915	23
18	Karel Abraham	Aprilia	+48.240	22
19	Jordi Carchano	Aprilia	+48.367	24
20	Pablo Nieto	Derbi	+48.693	20
21	Mateo Tunez	Aprilia	+48.940	32
22	Jules Cluzel	Honda	+1:07.174	28
23	Gioele Pellino	Malaguti	+1:07.453	33
24	Imre Tóth	Aprilia	+1:12.930	27
25	Manuel Hernandez	Aprilia	+1:13.742	30
26	Sasha Hommel	Honda	+1:36.276	35
Ret	Mika Kallio	KTM	Retirement	3
Ret	Alexis Masbou	Honda	Retirement	13
Ret	Federico Sandi	Honda	Retirement	29
Ret	Lorenzo Zanetti	Aprilia	Retirement	18
Ret	David Bonache	Honda	Retirement	34
Ret	Hector Faubel	Aprilia	Retirement	2
Ret	Sergio Gadea	Aprilia	Retirement	5
Ret	Daniel Saez	Aprilia	Retirement	31
Ret	Raffaele de Rosa	Aprilia	Retirement	12