How old (or young) can a youth be to join Scouting?

Cub Scouting is for youth in the first through fifth grades, or 7 to 10 years of age. Children who are older than 10, or who have completed the fifth grade, can no longer join Cub Scouting, but they may be eligible to join the Boy Scouting or Venturing program.

Boy Scouting is for youth 11 to 17 years of age. Scouts also may become Boy Scouts if they have earned the Cub Scouting Arrow of Light Award and are at least 10 years old or have completed the fifth grade and are at least 10 years old.

Venturing is a year-round program for young men and women who are 14 (and have completed the eighth grade) through 20 years of age.