Grand Prix Sepeda Motor musim 1951 merupakan penyelengeraan ketiga Grand Prix Sepeda Motor F.I.M.. Pada musim ini terdapat 5 kelas; 500cc, 350cc, 250cc, 125cc and Sidecars 500cc. Kejuaraan dimulai 8 April di Grand Prix Spanyol dan berakhir di Grand Prix Nations pada 9 September.

Seri	Tanggal	Grand Prix	Sirkuit	Pemenang 125cc	Pemenang 250cc	Pemenang 350cc	Pemenang 500cc	Pemenang Sidecars 500cc	Laporan
1	8 April	Grand Prix Spanyol	Montjuïc	Gianni Leoni		Tommy Wood	Umberto Masetti	Oliver / Dobelli	Laporan
2	27 Mei	Grand Prix Swiss	Bremgarten		Dario Ambrosini	Leslie Graham	Fergus Anderson	Frigerio / Ricotti	Laporan
3	8 Juni	Isle of Man TT	Snaefell Mountain	Cromie McCandless	Tommy Wood	Geoff Duke	Geoff Duke		Laporan
4	1 Juli	Grand Prix Belgia	Spa-Francorchamps			Geoff Duke	Geoff Duke	Oliver / Dobelli	Laporan
5	7 Juli	Dutch TT	Assen	Gianni Leoni		Bill Doran	Geoff Duke		Laporan
6	14 Juli	Grand Prix Prancis	Albi		Bruno Ruffo	Geoff Duke	Alfredo Milani	Oliver / Dobelli	Laporan
7	18 Agustus	Grand Prix Ulster	Clady	Cromie McCandless †	Bruno Ruffo	Geoff Duke	Geoff Duke		Laporan
8	9 September	Grand Prix Nations	Monza	Carlo Ubbiali	Enrico Lorenzetti	Geoff Duke	Alfredo Milani	Milani / Pizzocri	Laporan

† Perlombaan hanya terdapat empat pesaing dan tidak dihitung sebagai putaran Kejuaraan Dunia.

Pos Pembalap Motor ESP SUI MAN BEL HOL FRA ULS NAC Poin 1 Geoff Duke Norton Ret 1 1 1 5 1 4 35 2 Alfredo Milani Gilera Ret Ret 2 2 1 4 1 31 3 Umberto Masetti Gilera 1 9 Ret 4 3 2 21 4 Bill Doran AJS 2 Ret Ret 2 6 6 14 5 Nello Pagani Gilera Ret Ret 5 10 3 8 3 10 6 Reg Armstrong AJS 2 Ret 4 Ret Ret 9 7 Fergus Anderson Moto Guzzi Ret 1 Ret Ret 7 8 8 Enrico Lorenzetti Norton / Moto Guzzi Ret 3 8 3 9 Ret 8 9 Tommy Wood Norton 2 11 14 16 6 10 Ken Kavanagh Norton Ret 2 Ret 6 11 Johnny Lockett Norton Ret 6 4 10 5 11 6 12 Carlo Bandirola MV Agusta 5 4 Ret Ret 9 5 13 Sante Geminiani Moto Guzzi Ret Ret 3 Ret 13 4 14 Arciso Artesiani MV Agusta 3 Ret Ret Ret 4 = Cromie McCandless Norton 3 4 16 Tommy McEwans Norton 4 3 = Roger Montané Norton 4 3 18 Jack Brett Norton 7 5 6 Ret 8 3 19 Bruno Ruffo Moto Guzzi Ret 5 2 20 Manliff Barrington Norton 5 2 = Benoit Musy Moto Guzzi 5 2 22 Len Perry Norton 9 12 6 Ret 1 23 Willy Lips Norton 6 1 = Ashley Len Parry Norton 6 1 = Ernesto Vidal Gilera 6 1 26 Arthur Wheeler Norton Ret 7 14 11 Ret 0 27 Hans Baltisberger Norton 7 0 = Eric Briggs Norton 7 0 = Louis Carter Norton 7 0 = Libero Liberati Gilera 7 0 31 Albert Moule Norton 8 9 0 32 Bill Petch AJS/ Norton Ret Ret 8 Ret 15 0 33 Lous van Riswijk Triumph Ret 8 0 34 Massimo Forster Gilera 8 0 35 Väinö Hollming Norton / Moto Guzzi 9 Ret 0 36 Cees Fokke-Bosch Norton 9 0 37 Rod Coleman Norton / AJS Ret 10 11 Ret Ret 0 38 Sidney Mason Norton 10 Ret 0 39 Ken Armstrong Norton 10 0 = Phil Carter Norton 10 0 = Les Dear Norton 10 0 42 Ray Amm Norton 28 11 11 12 12 0 43 Guy Newman Norton 11 0 44 Jack Bailey Norton Ret 12 0 = Roy Evans Norton / AJS 12 Ret 0 46 Alexandre Mayer Norton 12 0 47 Harold Grindley Norton Ret 13 0 48 Dante Bianchi Moto Guzzi 13 0 = Dennis Lashmar Norton 13 0 50 Maurice Acheson AJS 14 0 = Giuseppe Colnago Gilera 14 0 = Auguste Goffin Norton 14 0 53 Bill Hall Velocette Ret 15 0 54 Jean Behra Moto Guzzi 15 0 = León Martin Gilera 15 0 = Roy Walker Velocette 15 0 57 Giulie Galbiati Moto Guzzi Ret 17 Ret 16 0 58 Felice Benasedo Moto Guzzi Ret 31 16 Ret Ret 0 59 Robert Ferguson AJS 16 0 = Sid Franklen AJS 16 0 61 Ernie Barrett AJS Ret 17 0 62 Syl Anderton Norton 17 0 = Lodovico Facchinelli Gilera 17 0 = Jack Harding AJS 17 0 65 Georges Houel Gilera Ret 18 0 66 Charlie Gray AJS 18 0 = George Brockerton Bitza 18 0 = Jaak Delsing Triumph 18 0 69 Leo Starr AJS 27 19 0 70 Ernie Thomas Velocette / Norton Ret 19 Ret 0 71 George Paterson AJS 19 0 72 Sven Sørensen Norton 20 0 = Albert Vertriest Triumph 20 0 74 Evert Carlsson Norton 21 0 = Ronald Pike BSA 21 0 76 Ray Petty Norton 22 0 77 Arnold Jones Norton 23 0 78 Achie Fenn Norton 24 0 79 Jim Kentish AJS 25 0 80 Humphrey Ranson AJS / Norton 26 Ret 0 81 Eddie Stidolph Norton 29 0 82 Max Klein AJS 30 0 83 Leslie Harris Norton 32 Ret 0 84 Ernie Braine Norton 33 0 85 John Fisher Velocette 34 0 86 Joe Chapman Rudge-Whitworth 35 0 87 Bill Maddrick Velocette 36 0 88 J. Gunn Norton 37 0 89 Bob McDonald AJS 38 0 90 Bill Beevers AJS / Norton Ret 39 0 – Leslie Graham MV Agusta / Norton Ret Ret Ret Ret Ret Ret Ret 0 – Bruno Bertacchini MV Agusta Ret Ret Ret Ret 0 – Bob Matthews Norton Ret Ret Ret Ret 0 – Eric Oliver Norton Ret Ret Ret Ret 0 – Mick Featherstone AJS Ret Ret 0 – Charlie Salt BSA / Velocette Ret Ret 0 – Edouard Texidor Norton Ret Ret 0 – Javier de Ortueta Norton DNS Ret 0 – Fernando Aranda Moto Guzzi Ret 0 – Raymond Becquevort AJS Ret 0 – Gaetano Biondelli Gilera Ret 0 – Charlie Brett Norton Ret 0 – Charlie Bruguiere AJS Ret 0 – Florian Camathias BMW Ret 0 – Bernard Carter Triumph Ret 0 – Phil Carter Norton Ret 0 – Jacques Collot Norton Ret 0 – Eugéne Cordang Triumph Ret 0 – Georges Cordey Norton Ret 0 – Firmin Dauwe Norton Ret 0 – Julien Deronne Norton Ret 0 – Jacques Drion Norton Ret 0 – Roger Ergé Norton Ret 0 – Lennart Fenning Norton Ret 0 – Tito Forconi Gilera Ret 0 – Frank Fry Norton Ret 0 – Werner Gerber Norton Ret 0 – Francesco Guglielminetti Gilera Ret 0 – Eric Hardy Norton Ret 0 – Philip Heath Vincent Ret 0 – Johnny Hodgkin Vincent Ret 0 – Chris Horn Norton Ret 0 – Sid Lawton AJS Ret 0 – George Leigh Norton Ret 0 – Guido Leoni Moto Guzzi Ret 0 – Harry Lindsay Norton Ret 0 – Maurice Lockwood AJS Ret 0 – Tony McAlpine Gilera Ret 0 – Reg McDonald Velocette Ret 0 – Stan Miller Norton Ret 0 – Georges Monneret Norton Ret 0 – George Morgan Velocette Ret 0 – Ken Mudford AJS Ret 0 – Alan Mullee Norton Ret 0 – Bill Mundy Norton Ret 0 – Arthur Pollitt Norton Ret 0 – Brian Purslow BSA Ret 0 – Jacques Raffeld AJS Ret 0 – Michael Roche Triumph Ret 0 – Elio Scopigno Moto Guzzi Ret 0 – Oliver Scott Norton Ret 0 – Ralf Seymour Velocette Ret 0 – Cyril Stevens Triumph Ret 0 – Heinrich Stamm Gilera Ret 0 – Jack Varlow AJS Ret 0 – Ernest Walker Norton Ret 0 – Leonard Williams Velocette Ret 0 Pos Pembalap Motor ESP SUI MAN BEL HOL FRA ULS NAC Poin

Warna Hasil Emas Pemenang Perak Posisi ke-2 Perunggu Posisi ke-3 Hijau Finis, dengan poin Biru Finis, tanpa poin Tidak terklasifikasi (NC) Ungu Tidak finis (Ret) Merah Tidak terkualifikasi (DNQ) Tidak mengikuti pra-kualifikasi (DNPQ) Hitam Diskualifikasi (DSQ) Putih Tidak start (DNS) Mengundurkan diri (WD) Balapan dibatalkan (C) Kosong Tidak berpartisipasi Dikecualikan (EX) Tebal – Pole Miring – Lap tercepat

Pos	Pembalap	Negara	Mesin	Poin	Menang
1	Geoff Duke	Britania Raya	Norton	40	5
2	Bill Doran	Britania Raya	AJS	19	1
3	John Lockett	Britania Raya	Norton	19	0
4	Ken Kavanagh	Australia	Norton	16	0
5	Jack Brett	Britania Raya	Norton	15	0
6	Leslie Graham	Britania Raya	Velocette	14	1
7	Reg Armstrong	Irlandia	AJS	11	0
8	Bill Petch	Britania Raya	AJS	10	0
9	Cecil Sandford	Britania Raya	Velocette	9	0
10	Tommy Wood	Britania Raya	Moto Guzzi	8	1
11	Bill Lomas	Britania Raya	Velocette	6	0
12	Rod Coleman	Selandia Baru	AJS	5	0
13	Mick Featherstone	Britania Raya	AJS	4	0
14	Fernando Aranda	Spanyol	Velocette	3	0
=	Paul Fuhrer	Swiss	Velocette	3	0
16	Sid Mason	Britania Raya	Velocette	2	0
=	Jack Raffeld	Belgia	Velocette	2	0
=	Simon Sandys-Winsch	Britania Raya	Velocette	2	0
19	Johnny Grace	Gibraltar	Norton	1	0
=	Bob Matthews	Irlandia	Velocette	1	0
=	Bob Foster	Britania Raya	Velocette	1	0
=	Leonhardt Faßl	Austria	AJS	1	0

Pos	Pembalap	Negara	Mesin	Poin	Menang
1	Bruno Ruffo	Italia	Moto Guzzi	22	2
2	Tommy Wood	Britania Raya	Moto Guzzi	18	1
3	Dario Ambrosini	Italia	Benelli	14	1
4	Enrico Lorenzetti	Italia	Moto Guzzi	12	1
5	Gianni Leoni	Italia	Moto Guzzi	10	0
6	Maurice Cann	Britania Raya	Moto Guzzi	6	0
=	Arthur Wheeler	Britania Raya	Velocette	6	0
8	Fergus Anderson	Britania Raya	Moto Guzzi	3	0
=	Wilf Hutt	Britania Raya	Moto Guzzi	3	0
=	Alano Montanari	Italia	Moto Guzzi	3	0
=	Benoit Musy	Swiss	Moto Guzzi	3	0
12	Bill Lomas	Britania Raya	Velocette	2	0
=	Cecil Sandford	Britania Raya	Velocette	2	0
=	Douglas Beasley	Britania Raya	Velocette	2	0
=	Bruno Francisci	Italia	Moto Guzzi	2	0
16	Fron Purslow	Britania Raya	Norton	1	0
=	Norman Blemings	Irlandia	Excelsior	1	0
=	Werner Gerber	Swiss	Moto Guzzi	1	0
=	Nino Grieco	Italia	Parilla	1	0
=	Guido Paciocca	Italia	Moto Guzzi	1	0

Pos	Pembalap	Negara	Mesin	Poin	Menang
1	Carlo Ubbiali	Italia	Mondial	20	1
2	Gianni Leoni	Italia	Mondial	12	1
3	Cromie McCandless	Britania Raya	Mondial	11	0
4	Luigi Zinzani	Italia	Morini	10	0
5	Guido Leoni	Italia	Mondial	8	1
6	Vittorio Zanzi	Italia	Morini	7	0
7	Romolo Ferri	Italia	Mondial	6	0
8	Leslie Graham	Britania Raya	MV Agusta	4	0
9	Juan Bultó	Spanyol	Montesa	4	0
10	Nello Pagani	Italia	Mondial	3	0
=	Raffaele Alberti	Italia	Mondial	3	0
12	Franco Bertoni	Italia	MV Agusta	2	0
=	Otello Spadoni	Italia	Mondial	2	0
14	Emilio Mendogni	Italia	Morini	1	0
=	José Antonio Elizalde	Spanyol	Mondial	1	0
=	José Maria Llobet	Spanyol	Montesa	1	0
=	Giuseppe Matucci	Italia	MV Agusta	1	0

• Büla, Maurice & Schertenleib, Jean-Claude (2001). Continental Circus 1949–2000. Chronosports S.A. ISBN 2-940125-32-5

• (Inggris) "Web Resmi MotoGP". Diarsipkan dari asli tanggal 2021-06-20. Diakses tanggal 7 Januari 2014.