The 1991 Individual Long Track World Championship was the 21st edition of the FIM speedway Individual Long Track World Championship. The event was held on 28 July 1991 at Mariánské Lázně in the Czech Republic, which was Czechoslovakia at the time.

The Championship format returned to the 18 rider field format with 6 riders in each heat.

The world title was won by Gerd Riss of Germany.

Final Classification

PosRiderHeat PtsHeat PtsHeat PtsHeat PtsHeat PtsTotal Pts
1Germany Gerd Riss5545524
2Czechoslovakia Aleš Dryml Sr.5453421
3Denmark Jan O. Pedersen4455321
4Switzerland Marcel Gerhard5444118
5New Zealand Mitch Shirra4551217
6Sweden Stefan Dannö3504ef12
7Germany Karl Maier433efE10
8England Andy Smith2242E10
9England Simon Wigg2233E10
10England Mark Loram1322E8
11Germany Klaus Lausch3310E7
12England Marvyn Cox2221E7
13England Steve Schofield311EE5
14Sweden Erik Stenlund103EE4
15Germany Hans Otto Pingel012EE3
16Germany Walter Scherwitzkiefef1EE1
17Czechoslovakia Jan Holub10efEE1
18Czechoslovakia Borivoj Hadekef10EE1
  • E = eliminated (no further ride)
  • f = fell
  • ef = engine failure
  • x = excluded