Thirty-seven nations were represented in the 2026 US Open junior singles draws.
The figure covered the boys’ and girls’ junior singles competitions. It showed the international reach of the US Open beyond the professional singles and doubles events, with young players arriving from countries across multiple continents.
The junior championships are an important pathway into professional tennis. Many established stars first appeared at Grand Slam junior events before progressing through the professional rankings. The junior draws also offer players experience of major-tournament conditions, media attention and international competition.
The 2026 junior fields included 37 American players as well as competitors from other nations. That number should not be confused with the 48 nations represented in the senior men’s and women’s singles draws. Junior nationality totals and senior-draw nationality totals measure different competitions.