What should be the weight of a 15 year old girl? Whose height is 5 feet 5 inches....

125-130 # Your ideal weight is 125 to 130 pounds, but there are other factors to take into account. If you've been following with a family practitioner or pediatrician, they should have been following your growth, and would know what is appropriate proportions for you. If you have stayed at certain percentiles for years, than your weight might be perfect for you.