| Grand Prix: | Isle of Man |
| Gp Suffix: | TT |
| Flag: | Isle of Man |
| Location: | Snaefell Mountain Course (Senior, Junior, Clubmans Senior and Clubmans Junior) Clypse Course (Ultra Lightweight, Lightweight and Sidecars) |
| Course: | Public roads; Mountain Course ; Clypse Course |
| Race No: | 1 |
| Season No: | 6 |
| Official Name: | Isle of Man Tourist Trophy |
| Date: | 4–14 June |
| Year: | 1956 |
| Fast Rider 500: | John Surtees |
| Fast Rider 500 Country: | UK |
| Fast Rider 500 Bike: | MV Agusta |
| Fast Time 500: | 23:09.4 |
| First Rider 500: | John Surtees |
| First Rider 500 Country: | UK |
| First Rider 500 Bike: | MV Agusta |
| Second Rider 500: | John Hartle |
| Second Rider 500 Country: | UK |
| Second Rider 500 Bike: | Norton |
| Third Rider 500: | Jack Brett |
| Third Rider 500 Country: | UK |
| Third Rider 500 Bike: | Norton |
| Fast Rider 350: | Ken Kavanagh |
| Fast Rider 350 Country: | Australia |
| Fast Rider 350 Bike: | Moto Guzzi |
| Fast Time 350: | 24:18.8 |
| First Rider 350: | Ken Kavanagh |
| First Rider 350 Country: | Australia |
| First Rider 350 Bike: | Moto Guzzi |
| Second Rider 350: | Derek Ennett |
| Second Rider 350 Country: | Isle of Man |
| Second Rider 350 Bike: | AJS |
| Third Rider 350: | John Hartle |
| Third Rider 350 Country: | UK |
| Third Rider 350 Bike: | Norton |
| Fast Rider 250: | Hans Baltisberger |
| Fast Rider 250 Country: | Germany |
| Fast Rider 250 Bike: | NSU |
| Fast Time 250: | 9:21.6 |
| First Rider 250: | Carlo Ubbiali |
| First Rider 250 Country: | Italy |
| First Rider 250 Bike: | MV Agusta |
| Second Rider 250: | Roberto Colombo |
| Second Rider 250 Country: | Italy |
| Second Rider 250 Bike: | MV Agusta |
| Third Rider 250: | Hans Baltisberger |
| Third Rider 250 Country: | Germany |
| Third Rider 250 Bike: | NSU |
| Fast Rider 125: | Carlo Ubbiali |
| Fast Rider 125 Country: | Italy |
| Fast Rider 125 Bike: | MV Agusta |
| Fast Time 125: | 9:09.8 |
| First Rider 125: | Carlo Ubbiali |
| First Rider 125 Country: | Italy |
| First Rider 125 Bike: | MV Agusta |
| Second Rider 125: | Marcelo Cama |
| Second Rider 125 Country: | Spain |
| Second Rider 125 Country Flag Suffix: | 1945 |
| Second Rider 125 Bike: | Montesa |
| Third Rider 125: | Francisco González |
| Third Rider 125 Country: | Spain |
| Third Rider 125 Country Flag Suffix: | 1945 |
| Third Rider 125 Bike: | Montesa |
| Fast Rider Sidecar: | Willhelm Noll |
| Fast Rider Sidecar Country: | Germany |
| Fast Rider Sidecar Bike: | BMW |
| Fast Passenger Sidecar: | Fritz Cron |
| Fast Passenger Sidecar Country: | Germany |
| Fast Time Sidecar: | 9:01.6 |
| First Rider Sidecar: | Fritz Hillebrand |
| First Rider Sidecar Country: | Germany |
| First Passenger Sidecar: | Manfred Grunwald |
| First Passenger Sidecar Country: | Germany |
| First Rider Sidecar Bike: | BMW |
| Second Rider Sidecar: | Pip Harris |
| Second Rider Sidecar Country: | UK |
| Second Passenger Sidecar: | Ray Campbell |
| Second Passenger Sidecar Country: | UK |
| Second Rider Sidecar Bike: | Norton |
| Third Rider Sidecar: | Bill Boddice |
| Third Rider Sidecar Country: | UK |
| Third Passenger Sidecar: | William Storr |
| Third Passenger Sidecar Country: | UK |
| Third Rider Sidecar Bike: | Norton |
The 1956 Isle of Man TT was the first round of the 1956 Grand Prix motorcycle racing season. It took place between 4 June and 8 June 1956 at the Snaefell Mountain Course for the Senior and Junior TTs and the Clypse Course for the Lightweight, Ultra Lightweight and Sidecar TTs.
| Pos | Rider | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|
| 1 |  John Surtees | MV Agusta | 7 | 2:44:05.8 | 8 | |
| 2 | John Hartle | MV Agusta | 7 | +1:30.8 | 6 | |
| 3 | Jack Brett | Norton | 7 | +2:48.4 | 4 | |
| 4 |  Walter Zeller | BMW | 7 | +3:16.4 | 3 | |
| 5 | Bill Lomas | Moto Guzzi | 7 | +3:22.8 | 2 | |
| 6 | Derek Ennett | Matchless | 7 | +6:34.6 | 1 | |
| 7 | Alan Trow | Norton | 7 | +9:22.0 | ||
| 8 |  Gavin Dunlop | Matchless | 7 | +9:22.0 | ||
| 9 | George Salt | Norton | 7 | +10:13.4 | ||
| 10 | Don Chapman | Norton | 7 | +10:37.4 | ||
| 45 finishers | ||||||
| [1] | ||||||
| Pos | Rider | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|
| 1 |  Ken Kavanagh | Moto Guzzi | 7 | 2:57:29.4 | 8 | |
| 2 | Derek Ennett | AJS | 7 | +4:38.0 | 6 | |
| 3 | John Hartle | Norton | 7 | +7:19.2 | 4 | |
| 4 | Cecil Sandford | DKW | 7 | +7:19.4 | 3 | |
| 5 |  Eddie Grant | Norton | 7 | +10:14.6 | 2 | |
| 6 | Alan Trow | Norton | 7 | +11:11.4 | 1 | |
| 7 | Derek Powell | AJS | 7 | +11:46.6 | ||
| 8 | Frank Perris | AJS | 7 | +12:11.4 | ||
| 9 |  Duilio Agostini | Moto Guzzi | 7 | +13:23.2 | ||
| 10 | Terry Shepherd | Norton | 7 | +13:29.2 | ||
| 42 finishers | ||||||
| Pos | Rider | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|
| 1 | Carlo Ubbiali | MV Agusta | 9 | 1:26:54.0 | 8 | |
| 2 | Roberto Colombo | MV Agusta | 9 | +2:08.6 | 6 | |
| 3 | Hans Baltisberger | NSU | 9 | +2:30.6 | 4 | |
| 4 | Horst Kassner | NSU | 9 | +2:33.6 | 3 | |
| 5 | František Bartoš | ČZ | 9 | +5:11.0 | 2 | |
| 6 | Arthur Wheeler | Moto Guzzi | 9 | +5:26.6 | 1 | |
| 7 | Phil Carter | RDS | 9 | +8:32.2 | ||
| 8 | Albert Jones | Norton | 9 | +9:16.6 | ||
| 9 | Frank Cope | Norton | 9 | +11:51.2 | ||
| 10 | Norman Webb | Moto Guzzi | 9 | +16:36.2 | ||
| 10 finishers | ||||||
| Pos | Rider | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|
| 1 | Carlo Ubbiali | MV Agusta | 9 | 1:24:16.8 | 8 | |
| 2 |  Marcelo Cama | Montesa | 9 | +5:02.4 | 6 | |
| 3 | Francisco González | Montesa | 9 | +11:02.0 | 4 | |
| 4 | Enrique Sirera | Montesa | 9 | +11:07.0 | 4 | |
| 5 | Dave Chadwick | LEF | 9 | +12:26.0 | 2 | |
| 6 | Václav Parus | ČZ | 9 | +13:07.2 | 1 | |
| 7 | Douglas Allen | Mondial | 9 | +14:01.6 | ||
| 8 | Dudley Edlin | MV Agusta | 9 | +15:28.2 | ||
| 9 | Frank Cope | Norton | 9 | +20:01.8 | ||
| 9 finishers | ||||||
| Pos | Rider | Passenger | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|---|
| 1 | Fritz Hillebrand | Manfred Grunwald | BMW | 9 | 1:23:12.2 | 8 | |
| 2 | Pip Harris | Ray Campbell | Norton | 9 | +1:35.6 | 6 | |
| 3 | Bill Boddice | William Storr | Norton | 9 | +3:07.0 | 4 | |
| 4 | Bob Mitchell | Eric Bliss | Norton | 9 | +4:04.6 | 3 | |
| 5 | Jackie Beeton | Les Nutt | Norton | 9 | +5:41.4 | 2 | |
| 6 | Ernie Walker | Dun Roberts | Norton | 9 | +5:47.2 | 1 | |
| 7 | Fred Hanks | E. Donnan | Matchless | 9 | +8:35.8 | ||
| 8 | Alan Young | Tony Partridge | Norton | 9 | +9:01.8 | ||
| 9 | Bill Beevers | Jeff Mundy | Norton | 9 | +9:29.8 | ||
| 10 | Len Taylor | Peter Glover | Norton | 9 | +9:53.2 | ||
| 15 finishers | |||||||
| Pos | Rider | Manufacturer | Laps | Time | |
|---|---|---|---|---|---|
| 1 | Bernard Codd | BSA | 3 | 1:18:40.6 | |
| 2 | Ron Jerrard | BSA | 3 | +1:06.2 | |
| 3 | Tony Jenkins | BSA | 3 | +2:41.8 | |
| 4 | Fred Wallis | BSA | 3 | +2:43.6 | |
| 5 | Dennis Smart | BSA | 3 | +4:34.4 | |
| 6 | Geoffrey Coombes | BSA | 3 | +5:24.2 | |
| 7 | John Hurlstone | Triumph | 3 | ||
| 8 | W. J. Hill | BSA | 3 | ||
| 9 | Brian Newman | BSA | 3 | ||
| 10 | David Andrews | BSA | 3 | ||
| 28 finishers | |||||
| [2] | |||||
| Pos | Rider | Manufacturer | Laps | Time | |
|---|---|---|---|---|---|
| 1 | Bernard Codd | BSA | 3 | 1:22:48.4 | |
| 2 | John Eckhart | BSA | 3 | +41.6 | |
| 3 | Alan Shepherd | Norton | 3 | +2:54.8 | |
| 4 | Eric Unwin | BSA | 3 | +3:19.6 | |
| 5 | Derrick Jervis | BSA | 3 | +3:20.4 | |
| 6 | Jimmy Morton | BSA | 3 | +3:32.8 | |
| 7 | James Coates | BSA | 3 | ||
| 8 | Norman Robertson | BSA | 3 | ||
| 9 | Ken James | BSA | 3 | ||
| 10 | Denis Pratt | BSA | 3 | ||
| 50 finishers | |||||