2004 World Junior Championships in Athletics

The 2004 World Junior Championships in Athletics were held in Grosseto, Italy on 12–18 July.

Participation
According to an unofficial count through an unofficial result list, 1261 athletes from 168 countries participated in the event. This is in agreement with the official numbers as published.

• 🇦🇱 albania (2)

• undefined (5)

• 🇦🇩 andorra (2)

• 🇦🇬 antigua and barbuda (2)

• 🇦🇷 argentina (3)

• 🇦🇲 armenia (2)

• undefined (1)

• 🇦🇺 australia (42)

• 🇦🇹 austria (3)

• 🇦🇿 azerbaijan (1)

• undefined (10)

• 🇧🇭 bahrain (1)

• undefined (1)

• 🇧🇾 belarus (23)

• 🇧🇪 belgium (10)

• undefined (1)

• 🇧🇯 benin (1)

• undefined (1)

• 🇧🇴 bolivia (1)

• 🇧🇦 bosnia and herzegovina (2)

• undefined (4)

• 🇧🇷 brazil (19)

• undefined (1)

• undefined (1)

• 🇧🇬 bulgaria (9)

• undefined (1)

• 🇧🇮 burundi (5)

• 🇨🇦 canada (21)

• 🇨🇻 cape verde (1)

• undefined (1)

• 🇨🇫 central african republic (1)

• undefined (5)

• 🇨🇳 china (31)

• undefined (7)

• 🇨🇴 colombia (4)

• 🇨🇰 cook islands (1)

• undefined (14)

• 🇨🇺 cuba (4)

• 🇨🇾 cyprus (8)

• 🇨🇿 czech republic (15)

• undefined (1)

• 🇩🇯 djibouti (1)

• 🇩🇲 dominica (1)

• 🇩🇴 dominican republic (1)

• 🇪🇨 ecuador (3)

• 🇪🇬 egypt (3)

• undefined (1)

• 🇪🇷 eritrea (1)

• 🇪🇪 estonia (9)

• 🇪🇹 ethiopia (9)

• undefined (2)

• 🇫🇮 finland (27)

• 🇫🇷 france (48)

• 🇵🇫 french polynesia (1)

• 🇬🇦 gabon (1)

• undefined (2)

• 🇩🇪 germany (63)

• 🇬🇭 ghana (1)

• 🇬🇮 gibraltar (1)

• 🇬🇧 united kingdom (32)

• undefined (18)

• undefined (1)

• 🇬🇺 guam (1)

• undefined (1)

• undefined (1)

• 🇭🇰 hong kong (1)

• 🇭🇺 hungary (20)

• 🇮🇸 iceland (2)

• 🇮🇳 india (7)

• undefined (4)

• 🇮🇪 ireland (10)

• 🇮🇱 israel (4)

• 🇮🇹 italy (50)

• 🇯🇲 jamaica (30)

• 🇯🇵 japan (36)

• 🇯🇴 jordan (1)

• 🇰🇿 kazakhstan (3)

• 🇰🇪 kenya (20)

• 🇰🇮 kiribati (1)

• undefined (1)

• 🇰🇬 kyrgyzstan (2)

• 🇱🇦 lao people's democratic republic (1)

• undefined (9)

• undefined (1)

• undefined (1)

• 🇱🇹 lithuania (7)

• 🇲🇴 macao (1)

• 🇲🇰 macedonia (1)

• undefined (1)

• undefined (1)

• undefined (1)

• 🇲🇻 maldives (1)

• 🇲🇹 malta (2)

• undefined (1)

• 🇲🇽 mexico (11)

• 🇫🇲 micronesia (1)

• undefined (1)

• 🇲🇦 morocco (12)

• undefined (2)

• 🇳🇦 namibia (3)

• 🇳🇷 nauru (1)

• undefined (1)

• undefined (10)

• undefined (1)

• 🇳🇿 new zealand (10)

• undefined (1)

• undefined (1)

• undefined (5)

• 🇳🇫 norfolk island (1)

• 🇳🇴 norway (7)

• undefined (4)

• 🇵🇰 pakistan (1)

• 🇵🇼 palau (1)

• undefined (1)

• 🇵🇦 panama (1)

• 🇵🇬 papua new guinea (1)

• undefined (1)

• 🇵🇪 peru (4)

• undefined (1)

• 🇵🇱 poland (31)

• undefined (7)

• undefined (7)

• 🇶🇦 qatar (6)

• 🇷🇴 romania (21)

• 🇷🇺 russia (60)

• 🇷🇼 rwanda (2)

• undefined (1)

• 🇱🇨 saint lucia (1)

• undefined (1)

• undefined (1)

• 🇸🇲 san marino (1)

• 🇸🇹 sao tome and principe (1)

• undefined (14)

• 🇸🇳 senegal (6)

• undefined (6)

• undefined (1)

• undefined (1)

• 🇸🇰 slovakia (5)

• undefined (6)

• undefined (1)

• undefined (37)

• 🇰🇷 south korea (8)

• 🇪🇸 spain (22)

• undefined (1)

• undefined (5)

• 🇸🇿 swaziland (1)

• 🇸🇪 sweden (17)

• undefined (13)

• 🇸🇾 syrian arab republic (1)

• 🇹🇯 tajikistan (1)

• undefined (1)

• 🇹🇭 thailand (1)

• undefined (1)

• undefined (1)

• undefined (11)

• 🇹🇳 tunisia (4)

• 🇹🇷 turkey (14)

• 🇹🇲 turkmenistan (1)

• 🇹🇨 turks and caicos islands (1)

• 🇺🇬 uganda (7)

• 🇺🇦 ukraine (33)

• 🇺🇸 united states (78)

• undefined (2)

• 🇺🇿 uzbekistan (10)

• 🇻🇪 venezuela (7)

• 🇾🇪 yemen (1)

• undefined (1)

• undefined (1)