The Junior World Orienteering Championships (JWOC) are an annual orienteering competition. They were first held in 1990. Entry is open to national teams aged 20 and below as of 31 December in the year of competition. Representative countries must be members of the International Orienteering Federation (IOF).
An international junior match was arranged first time in 1983 in Ry, Denmark, and then in 1984 (Hartberg, Austria) and 1985 (Font-Romeau, France). From 1986 (in Pécs, Hungary) the events became the unofficial Junior European Championships, and were held the following years, 1987 (Ambleside, England), 1988 (Eupen, Belgium) and 1989 (Seefeld/Kufstein, Austria). From 1990 (Älvsbyn, Sweden), the competition became official Junior World Orienteering Championships.
Originally JWOC started with an Individual (Classic) competition followed by a relay. The Short Distance Championships were added in 1991, which remained until 2004 where the Short Distance became the Middle Distance, falling into line with the World Orienteering Championships.
An unofficial Sprint Race was held in Switzerland in 2005 in conjunction with the PostFinance-Sprint ****PostFinance Sprint****. Shortly following this event the Sprint discipline was added to the program for Lithuania 2006. From 2022 onward the Middle Distance Qualification has been replaced by the Sprint relay discipline with four runners in each team. Two women (1st & 4th leg) and two men (2nd &3rd leg).
The 2006 Junior World Champion in the long distance event for women was Johanna Allston (or Hanny Allston) of Australia. It was the first time in this event that a gold medal has been won by a non-European nation. Since then, Matt Ogden (2012), Aston Key (2019), and Tim Robertson (2014 and 2015), are the only non-Europeans to win gold medals at the Junior World Championships.