Over 200 countries and 3,600 athletes participated in the inaugural 2010 Youth Summer Olympics. Participants are placed in the following age groups: 15–16 years, 16–17 years, and 17–18 years.
The first-ever 2010 Youth Summer Olympics drew over 200 countries and 3,600 athletes. Participants were grouped by age into categories of 15- to 16-year-olds, 16- to 17-year-olds, and 17- to 18-year-olds.