Chichi
Favorite Answer
129-170. But everyone's body is different. I'm also 15 and 5"9'. I weigh 153lbs and I look fine
yoman.
http://lmgtfy.com/?q=average+weight+for+a+15+year+old+girl+who+is+5%229%27
ladystang
145
Betty B
125lbs to 165lbs but there's nothing average about a girl being 5'9.
Get down to 120lbs or less and whatever you look like, you can become a top model.