Can a 21 date a 17 year old in new york state?

i believe... if its more than 5 years younger, its illegal.

and the age of consent for sex, in ny, is... 17.

so... your within the 5 year gap. and shes at the age of consent.. so i think... you're good.

http://www.livestrong.com/article/12483-age-consensual-sex/

look it up though. its a law written somewhere. search for it. dont just take the easy way out and take someones Word for it.

Dating is not illegal. But parents can make rules for dating if you are still living at home.

If you are talking about having sex, then please ask another question.