The 1949 Belgian motorcycle Grand Prix was the fourth round of the 1949 Grand Prix motorcycle racing season. It took place at the Circuit de Spa-Francorchamps.

British rider Bill Doran won the 500cc race riding his AJS from Arciso Artesiani and Enrico Lorenzetti.

By winning their second race of the 600 cc Sidecar of the season British Norton rider Eric Oliver and his swinger Denis Jenkinson wrapped up the first Sidecar championship before the third and final round to be held at the Nations Grand Prix. In the same race, Belgian sidecar rider Edouard Bruylant and his British passenger known as "Hurst" were killed.

Pos	Rider	Manufacturer	Time	Points
1	Bill Doran	AJS	1:19:56.0	10
2	Arciso Artesiani	Gilera	+0.2	9
3	Enrico Lorenzetti	Moto Guzzi	+1.3	7
4	Artie Bell	Norton	+50.0	6
5	Nello Pagani	Gilera	+1:08.0	5
6	Guido Leoni	Moto Guzzi	+1:14.0
7	Harold Daniell	Norton
8	George Morrison	Norton
9	Syd Jensen	Triumph
10	Ken Bills	Velocette
16 finishers
[1][2]

Pos	Rider	Manufacturer	Time	Points
1	Freddie Frith	Velocette	1h 06m 14s	10.5
2	Bob Foster	Velocette	+16s	8.5
3	Johnny Lockett	Norton	+33s	7
4	David Whitworth	Velocette	+1m 39s	6
5	Eric McPherson	AJS	+2m 01s	5
6	Reg Armstrong	AJS	+2m 01s
7	Eric Oliver	Velocette
8	Enrico Lorenzetti	Moto Guzzi
9	Louis van Rijswijk	Velocette
10	Tommy Wood	Velocette
22 finishers
[2][3]

Pos	Rider	Passenger	Manufacturer	Time	Points
1	Eric Oliver	Denis Jenkinson	Norton	50m 07s	11
2	Frans Vanderschrick	Martin Whitney	Norton	+25s	8
3	Ernesto Merlo	Dino Magri	Gilera	+1m 33s	7
4	Roland Benz	Max Hirzel	BMW	+1m 54s	6
5	Pip Harris	Neil Smith	Norton	+2m 31s	5
6	Raymond Rorsvort	Louis van Leemput	BMW	+4m 33s
7	Alphonse Vervroegen	?	FN
8	Jean Debotze	?	Norton
8 finishers
[2][4]