The 2003 Individual Speedway Junior World Championship was the 27th edition of the World motorcycle speedway Under-21 Championships.

The final was won by Jarosław Hampel of the Poland.

World final

PlacingRiderTotal1234567891011121314151617181920PtsPos21
1Poland (14) Jarosław Hampel1433332141
2England (10) Chris Harris1332332132
3Poland (5) Rafał Szombierski11222231143
4Sweden (9) Fredrik Lindgren11032331132
5Slovenia (12) Matej Žagar1023113105
6Denmark (15) Niels Kristian Iversen9E330396
7Poland (16) Rafał Kurmański82131187
8Denmark (2) Kenneth Bjerre711E3278
9Sweden (6) Jonas Davidsson63002169
10Sweden (4) Peter Ljung632X10610
11England (1) David Howe601221611
12Poland (11) Robert Miśkowiak611121612
13England (13) Jamie Smith510202513
14United States (3) Ryan Fisher422EE-414
15Germany (7) Martin Smolinski +210100215
16England (8) Oliver Allen2EX110216
R1Poland (R1) Łukasz Romanek000R1
PlacingRiderTotal1234567891011121314151617181920PtsPos21

m - exclusion for exceeding two minute time allowance • t - exclusion for touching the tapes • x - other exclusion • e - retired or mechanical failure • f - fell • ns - non-starter • nc - non-classify

gate A - insidegate Bgate Cgate D - outside

+ Martin Smolinski replaced the injured Krzysztof Kasprzak (3rd in semi-final A).