The number of entries allotted to each ISU member federation is determined by their skaters' placements at the previous season's World Junior Figure Skating Championships in each respective discipline.

For the 2009–2010 season, in singles, the three best placed member nations at the 2009 World Junior Figure Skating Championships were allowed to enter two skaters in all seven events.

Member nations who did not qualify for the free skate but placed 25th through 30th in the short program were allowed to enter one skater in four of the events.

Member nations who qualified for the free skate at the World Junior Championships were allowed to enter two entries in all four events.

The host country was allowed to enter up to three skaters/teams in singles and dance in their event, and there was no limit to the number of pairs teams.