| Grand Prix: | Dutch |
| Gp Suffix: | TT |
| Flag: | Netherlands |
| Location: | TT Circuit Assen |
| Course Mi: | 10.275 |
| Course Km: | 16.536 |
| Race No: | 3 |
| Season No: | 6 |
| Date: | 9 July |
| Year: | 1949 |
| Fast Rider 500: | Nello Pagani |
| Fast Rider 500 Country: | Italy |
| Fast Rider 500 Bike: | Gilera |
| First Rider 500: | Nello Pagani |
| First Rider 500 Country: | Italy |
| First Rider 500 Bike: | Gilera |
| Second Rider 500: | Leslie Graham |
| Second Rider 500 Country: | United Kingdom |
| Second Rider 500 Bike: | AJS |
| Third Rider 500: | Arciso Artesiani |
| Third Rider 500 Country: | Italy |
| Third Rider 500 Bike: | Gilera |
| Fast Rider 350: | Freddie Frith |
| Fast Rider 350 Country: | United Kingdom |
| Fast Rider 350 Bike: | Velocette |
| First Rider 350: | Freddie Frith |
| First Rider 350 Country: | United Kingdom |
| First Rider 350 Bike: | Velocette |
| Second Rider 350: | Bob Foster |
| Second Rider 350 Country: | United Kingdom |
| Second Rider 350 Bike: | Velocette |
| Third Rider 350: | Johnny Lockett |
| Third Rider 350 Country: | United Kingdom |
| Third Rider 350 Bike: | Norton |
| Fast Rider 125: | Nello Pagani |
| Fast Rider 125 Country: | Italy |
| Fast Rider 125 Bike: | FB-Mondial |
| Fast Time 125: | 8:45.8 |
| First Rider 125: | Nello Pagani |
| First Rider 125 Country: | Italy |
| First Rider 125 Bike: | FB-Mondial |
| Second Rider 125: | Oscar Clemencich |
| Second Rider 125 Country: | Italy |
| Second Rider 125 Bike: | MV Agusta |
| Third Rider 125: | Carlo Ubbiali |
| Third Rider 125 Country: | Italy |
| Third Rider 125 Bike: | FB-Mondial |
The 1949 Dutch motorcycle Grand Prix was the third race of the 1949 Motorcycle Grand Prix season. It took place on the weekend of 9 July 1949 at the Assen circuit.
Italian rider Nello Pagani won the 500 cc race riding a Gilera from Leslie Graham and Arciso Artesiani. Pagani also won the 125 cc race on his smaller Gilera which saw him wrap up the first 125 cc World Championship having won the first two 125 cc races with only one race remaining.
Similarly, in winning the 350 cc race British Velocette rider Freddie Frith, having achieved a perfect score of 33 points from the first three races became the first 350 cc Motorcycle World Champion.
| Pos | Rider | Manufacturer | Time/Retired | Points |
|---|---|---|---|---|
| 1 |  Nello Pagani | Gilera | 1:47:32.7 | 11 |
| 2 |  Leslie Graham | AJS | +13.1 | 8 |
| 3 | Arciso Artesiani | Gilera | +1:03.9 | 7 |
| 4 | Artie Bell | Norton | +2:38.7 | 6 |
| 5 | Johnny Lockett | Norton | +4:47.9 | 5 |
| 6 | Harold Daniell | Norton | +6:48.2 | |
| 7 | Umberto Masetti | Gilera | ||
| 8 |  Harry Hinton | Norton | ||
| 9 | Oscar Clemencich | Gilera | ||
| 10 | Enrico Lorenzetti | Moto Guzzi | ||
| 11 |  Drikus Veer | Triumph | ||
| 12 | Oliver Scott | Norton | ||
| 20 finishers |
| Pos | Rider | Manufacturer | Time/Retired | Points |
|---|---|---|---|---|
| 1 | Freddie Frith | Velocette | 1:47:52.0 | 10 |
| 2 | Bob Foster | Velocette | +1.9 | 8 |
| 3 | Johnny Lockett | Norton | +1:56.9 | 7 |
| 4 | David Whitworth | Velocette | +2:05.1 | 6 |
| 5 | Eric McPherson | Velocette | +2:50.7 | 5 |
| 6 | Ted Frend | AJS | +3:10.3 | 1 |
| 7 | Artie Bell | Norton | ||
| 8 |  Reg Armstrong | AJS | ||
| 9 | Frank Fry | Velocette | ||
| 10 | Harry Hinton | Norton | ||
| 11 | Wilf Sleightholme | AJS | ||
| 12 | Bill Petch | AJS | ||
| 25 finishers |
| Pos. | Rider | Manufacturer | Laps | Time/Retired | Points | |
|---|---|---|---|---|---|---|
| 1 | Nello Pagani | FB-Mondial | 7 | 1:02:38.8 | 11 | |
| 2 | Oscar Clemencich | FB-Mondial | 7 | +48.3 | 8 | |
| 3 | Carlo Ubbiali | MV Agusta | 7 | +1:02.0 | 7 | |
| 4 | Franco Bertoni | MV Agusta | 7 | +1:42.3 | 6 | |
| 5 | Giuseppe Matucci | MV Agusta | 7 | +5:09.0 | 5 | |
| 6 | Toon van Zutphen | Eysink | ||||
| 7 | Jan Rietveld | DMF | ||||
| 8 | Kees Huybregts | Eysink | ||||
| 9 | N. C. Luybregts | CZ | ||||
| 10 | Gijs Lagerweij | Sparta | ||||
| 11 | H. Verhagen | Eysink | ||||
| 12 |  José Maria Llobet | Montesa | ||||
| DSQ | Umberto Masetti | Moto Morini | Disqualified | |||
| 25 starters, 17 finishers | ||||||
| Source:[1] | ||||||