Typically, it ranges between 16 to 18 years old. The age of consent in the United States is determined by each individual jurisdiction. It may also differ depending on the specific circumstances of the sexual activity, for example, whether or not one individual is in a position of trust or authority. This age is a legal concept that may vary by state. The age of consent is the minimum age when an individual is considered to be legally competent to consent to sexual activity with another individual. Are You a Lawyer? Grow Your Practice What Is the Age of Consent?