Scouts Canada offers programs for boys and girls, young men and women aged 5-26:

Beaver Scouts 
Girls and boys 5 to 7 years of age.

Cub Scouts
Girls and boys 8 to 10 years of age.

Scouts
Girls and boys 11 to 14 years of age. (with option to remain until age 16)

Venturer Scouts
Young men and women 14 to 17 years of age.

Rover Scouts
Men and women 18 to 26 years of age. 

SCOUTSabout
Girls and boys 5 - 10 years of age.

Extreme Adventure
Young men and women 14 - 17 years of age.