How old are you when in junior high school with out skipping a grade?

In the United States, students typically start junior high school at age 12 or 13, assuming they started kindergarten at the typical age of 5 or 6 and progressed through elementary and middle school without skipping a grade. Junior high school typically includes grades 7 and 8, so students who start at age 12 or 13 would be 13 or 14 years old when they finish. However, the exact ages may vary depending on the individual school district and the student's specific grade progression.