What is the youngest age you can get a hysterectomy?

A hysterectomy can be done in childhood, if it's absolutely necessary- but that is most always done due to extreme trauma of the pelvis. Like any surgical procedure, there needs to be medical justification for doing it. If there is justification, it can be done at any age. If there isn't any, then it doesn't matter how old you are, because they won't do it. The youngest I'm aware of to have it done was somewhere around 8, and it was the result of being hit by a car and having some really terrible pelvic injuries. But if you are looking at this as a possibility just because you find the monthly period inconvenient or painful, that's not sufficient cause. There are other non-surgical interventions that are effective, so removal wouldn't be an option.