The 1999 IAAF World Cross Country Championships took place on 27 and 28 March 1999.

The races were held at the Barnett Demesne/Queen's University Playing Fields in Belfast, United Kingdom.

[4][5][6][7][8][9] Complete results for senior men,[10][11][12] for senior men's teams,[10][13][14] for men's short race,[15][16][17] for men's short race teams,[15][18][19] for junior men,[20][21][22] for junior men's teams,[20][23][24] senior women,[25][26][27] for senior women's teams,[25][28][29] for women's short race,[30][31][32] for women's short race teams,[30][33][34] for junior women,[35][36][37] for junior women's teams,[35][38][39] medallists,[40] and the results of British athletes who took part[41] were published.

†: Nadia Ejjafini of  Morocco was the original 21st-place finisher in 22:37 min, but was disqualified for age falsification.

[42] *   Host nation (Great Britain)An unofficial count yields the participation of 759 athletes from 66 countries.