In North Carolina, it's 16.
Source:
North Carolina
The age of consent in North Carolina is 16, though no school faculty member can have any sexual activity with any student except when married to the person {§14‑27.7}. Any sexual intercourse with a person under 16 years of age is prohibited unless the defendant is less than 3 years older than the victim except when married to the person {§14‑27.2, 14‑27.4 & 14‑27.7A}.
§ 14‑27.7A. Statutory rape or sexual offense of person who is 13, 14, or 15 years old.
(a) A defendant is guilty of a Class B1 felony if the defendant engages in vaginal intercourse or a sexual act with another person who is 13, 14, or 15 years old and the defendant is at least six years older than the person, except when the defendant is lawfully married to the person.
(b) A defendant is guilty of a Class C felony if the defendant engages in vaginal intercourse or a sexual act with another person who is 13, 14, or 15 years old and the defendant is more than three but less than six years older than the person, except when the defendant is lawfully married to the person.