What is the average weight of a 23-year-old woman?

It depends on your body frame and the amount of muscle that you have. Weight is related to height and body composition rather than age. If you have small body frame then the average weight is about 140-148 pounds. If you have medium body frame then the average weight is about 145-157 pounds. If you have large body frame then the average weight is about 152-172 pounds.