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

[1][2][3] The final was won by Jarosław Hampel of the Poland.

[4][5] 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 + Martin Smolinski replaced the injured Krzysztof Kasprzak (3rd in semi-final A).