| Grand Prix: | Swiss |
| Flag: | Switzerland |
| Location: | Geneva, Switzerland |
| Course Mi: | 3.726 |
| Course Km: | 5.996 |
| Course: | Public roads |
| Race No: | 4 |
| Season No: | 6 |
| Date: | 23 July |
| Year: | 1950 |
| Fast Rider 500: | Carlo Bandirola |
| Fast Rider 500 Country: | Italy |
| Fast Rider 500 Bike: | Gilera |
| Fast Time 500: | 2:42 |
| First Rider 500: | Leslie Graham |
| First Rider 500 Country: | United Kingdom |
| First Rider 500 Bike: | AJS |
| Second Rider 500: | Umberto Masetti |
| Second Rider 500 Country: | Italy |
| Second Rider 500 Bike: | Gilera |
| Third Rider 500: | Carlo Bandirola |
| Third Rider 500 Country: | Italy |
| Third Rider 500 Bike: | Gilera |
| Fast Rider 350: | Bob Foster |
| Fast Rider 350 Country: | United Kingdom |
| Fast Rider 350 Bike: | Velocette |
| Fast Time 350: | 2:39 |
| First Rider 350: | Leslie Graham |
| First Rider 350 Country: | United Kingdom |
| First Rider 350 Bike: | AJS |
| Second Rider 350: | Bob Foster |
| Second Rider 350 Country: | United Kingdom |
| Second Rider 350 Bike: | Velocette |
| Third Rider 350: | Geoff Duke |
| Third Rider 350 Country: | United Kingdom |
| Third Rider 350 Bike: | Norton |
| Fast Rider 250: | Dario Ambrosini |
| Fast Rider 250 Country: | Italy |
| Fast Rider 250 Bike: | Benelli |
| Fast Time 250: | 2:52.2 |
| First Rider 250: | Dario Ambrosini |
| First Rider 250 Country: | Italy |
| First Rider 250 Bike: | Benelli |
| Second Rider 250: | Bruno Ruffo |
| Second Rider 250 Country: | Italy |
| Second Rider 250 Bike: | Moto Guzzi |
| Third Rider 250: | Dickie Dale |
| Third Rider 250 Country: | United Kingdom |
| Third Rider 250 Bike: | Benelli |
| Fast Rider Sidecar: | Eric Oliver |
| Fast Rider Sidecar Country: | UK |
| Fast Rider Sidecar Bike: | Norton |
| Fast Passenger Sidecar: | Lorenzo Dobelli |
| Fast Passenger Sidecar Country: | Italy |
| Fast Time Sidecar: | 3:04.2 |
| First Rider Sidecar: | Eric Oliver |
| First Rider Sidecar Country: | United Kingdom |
| First Passenger Sidecar: | Lorenzo Dobelli |
| First Passenger Sidecar Country: | Italy |
| First Rider Sidecar Bike: | Norton |
| Second Rider Sidecar: | Ercole Frigerio |
| Second Rider Sidecar Country: | Italy |
| Second Passenger Sidecar: | Ezio Ricotti |
| Second Passenger Sidecar Country: | Italy |
| Second Rider Sidecar Bike: | Gilera |
| Third Rider Sidecar: | Ferdinand Aubert |
| Third Rider Sidecar Country: | Switzerland |
| Third Passenger Sidecar: | René Aubert |
| Third Passenger Sidecar Country: | Switzerland |
| Third Rider Sidecar Bike: | Norton |
The 1950 Swiss motorcycle Grand Prix was the fourth race of the 1950 Grand Prix motorcycle racing season. It took place on the weekend of 23 July 1950 in Geneva.
| Pos | Rider | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|
| 1 |  Leslie Graham | AJS | 34 | 1:36:57 | 8 | |
| 2 |  Umberto Masetti | Gilera | 34 | +1:14 | 6 | |
| 3 | Carlo Bandirola | Gilera | 34 | +1:15 | 4 | |
| 4 | Geoff Duke | Norton | 34 | +1:44 | 3 | |
| 5 | Harold Daniell | Norton | 2 | |||
| 6 | Johnny Lockett | Norton | 1 | |||
| 7 |  Georges Cordey | Norton | ||||
| 8 |  Reg Armstrong | Velocette | ||||
| 9 |  Georges Houel | Gilera | ||||
| 10 | Nello Pagani | Gilera | ||||
| 11 | Albert Moule | Norton | ||||
| 12 | Arciso Artesiani | MV Agusta | ||||
| 13 | Benoît Musy | Moto Guzzi | ||||
| 14 | Hans Haldemann | Norton | ||||
| 15 |  Jim Swarbrick | Norton | ||||
| 16 | Willy Lips | Norton | ||||
| 17 | Denis Jenkinson | Norton | ||||
| 18 | Phil Heath | Norton | ||||
| [1] | ||||||
| Pos | Rider | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|
| 1 | Leslie Graham | AJS | 25 | 1:11:25 | 8 | |
| 2 | Bob Foster | Velocette | 25 | +0:18 | 6 | |
| 2 | Umberto Masetti | Gilera | 34 | +1:14 | 6 | |
| 3 | Geoff Duke | Norton | 25 | +0:47 | 4 | |
| 4 | Reg Armstrong | Velocette | 25 | +1:04 | 3 | |
| 5 | Ted Frend | AJS | 25 | +1:12 | 2 | |
| 6 | Dickie Dale | AJS | 25 | +1:12 | 1 | |
| 7 |  Harry Hinton | Norton | 25 | +1:46 | ||
| 8 | Bill Lomas | Velocette | 25 | +1:48 | ||
| 9 | Harold Daniell | Norton | 25 | +1:49 | ||
| 10 | Johnny Lockett | Norton | ||||
| 11 | Tommy Wood | Velocette | ||||
| 12 | Syd Jensen | AJS | ||||
| 13 |  Väinö Hollming | AJS | ||||
| 14 | Fergus Anderson | AJS | ||||
| 15 | Phil Heath | Norton | ||||
| 16 | Eric McPherson | AJS | ||||
| 17 | Ernie Thomas | Velocette | ||||
| 18 | Heinrich Stamm | Velocette | ||||
| 19 | Bill Beevers | Velocette | ||||
| 20 | J. Zuber | Norton | ||||
| 21 | Willy Lips | Norton | ||||
| 22 | Arthur Wick | AJS | ||||
| Pos | Rider | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|
| 1 | Dario Ambrosini | Benelli | 21 | 1:01:48.2 | 8 | |
| 2 | Bruno Ruffo | Moto Guzzi | 21 | +47.4 | 6 | |
| 3 | Dickie Dale | Benelli | 21 | +57.8 | 4 | |
| 4 | Benoît Musy | Moto Guzzi | 21 | +2:42.8 | 3 | |
| 5 | Carlo Bellotti | Moto Guzzi | 2 | |||
| 6 | Onorato Francone | Moto Guzzi | 1 | |||
| 7 | Roberto Colombo | Moto Guzzi | ||||
| 8 | Elio Scopigno | Moto Guzzi | ||||
| 9 | Claudio Mastellari | Moto Guzzi | ||||
| Pos | Rider | Passenger | Manufacturer | Laps | Time | Points | |
|---|---|---|---|---|---|---|---|
| 1 | Eric Oliver | Lorenzo Dobelli | Norton | 17 | 52:59.8 | 8 | |
| 2 | Ercole Frigerio | Ezio Ricotti | Gilera | 17 | +40.0 | 6 | |
| 3 | Ferdinand Aubert | René Aubert | Norton | 17 | +2:34.8 | 4 | |
| 4 | Henri Meuwly | Pierre Dévaud | Gilera | 3 | |||
| 5 | Willy Wirth | Fred Schürtenberger | Gilera | 2 | |||
| 6 |  Marcel Masuy | Denis Jenkinson | BMW | 1 | |||
| 7 | Hans Haldemann | Josef Albisser | Norton | ||||
| 8 | Heinrich Stamm | ? | Norton | ||||
| 9 | Edouard Hordelalay | ? | Norton | ||||
| 10 | Fritz Mühlemann | Marie Mühlemann | Norton | ||||