Question: what is the average height of a teenage girl?
Answer: The average 14-year-old girl was 63.7 inches or almost 5 feet 4 inches. Afterward, girls grew an average half inch during the next 5 years, mostly between the ages of 16 and 17 when they grew from 63.8 to 64.2 inches. The average 17-, 18- and 19-year-old girl was 64.2 inches, or just over 5 feet 4 inches.