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The 2004–05 ISU Junior Grand Prix was the eighth season of the ISU Junior Grand Prix, a series of international junior level competitions organized by the International Skating Union. It was the junior-level complement to the Grand Prix of Figure Skating, which was for senior-level skaters. Skaters competed in the disciplines of men's singles, ladies' singles, pair skating, and ice dance. The top skaters from the series met at the Junior Grand Prix Final.

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The 2005 Central American Junior and Youth Championships in Athletics were held at the Estadio de Atletismo del Instituto Nicaragüense de Deportes in Managua, Nicaragua, between May 21–22, 2005. Organized by the Central American Isthmus Athletic Confederation (CADICA), it was the 18th edition of the Junior (U-20) and the 13th edition of the Youth (U-18) competition. A total of 80 events were contested, 40 by boys and 40 by girls. Overall winner on points was  Costa Rica.

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The 2005 European Athletics Junior Championships was the 18th edition of the biennial athletics competition for European under-20 athletes, which was held in Kaunas, Lithuania on 21–24 July.

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The 5th European Athletics U23 Championships were held in Erfurt, Germany, at Steigerwaldstadion between 14–17 July 2005.

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The 13th Pan American Junior Athletics Championships were held in Windsor, Ontario at the University of Windsor Stadium on July 29–31, 2005.

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The 36th South American Junior Championships in Athletics were held at the Estadio Municipal Jorge Newbery in Rosario, Argentina from October 1–2, 2005.

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The 2005 World Junior Curling Championships were held from March 3 to 13 at the Pinerolo Palaghiaccio in Pinerolo, Italy.

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The 2005 World Youth Championships in Athletics were held in Marrakesh, Morocco on July 13–July 17. The host stadium was Stade Sidi Youssef Ben Ali.

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The 2005 Youth Parapan American Games were an international multi-sport event for athletes aged 12 to 21 with physical disabilities held from October 22 to October 30, 2005 in Barquisimeto, Venezuela. They were the first edition of the Youth Parapan American Games, created by the Americas Paralympic Committee after the 2003 Pan American Games in order to reduce the large average age gap between countries in the Americas.