People of any age can date each other. If either of them are under age their parents have to agree to the dating. It is never illegal to date with parental approval. However, each state has their own rules about sex and intercourse so as long as there is

What age can a 17 year old date?

As a 17-year-old, you may only have sex with someone who consents and is up to the age of 23, until youre 18 years old.