In Minnesota, the age of consent is 16 years old. This means that it is legal for an 18 year old to date a 16 year old in Minnesota. However, it is important to keep in mind that sexual activity between an 18 year old and a 16 year old may still be illegal if it is non-consensual or if there is a power imbalance between the two individuals. It is important to always ensure that any sexual activity is consensual and respectful of both individuals involved.