I am confused about where to to obtain a student visa for my son who will be studying in Spain through his college, which is located in Maine. My son is a permanent resident of New Jersey. Does he go to NYC or to Boston for there student visa?

The answer likely depends on whether he will be applying for a visa through his college or study abroad program, or as an individual. The appointment sites for both consulates describe who's eligible to make an appointment like so: "Only apply at this Consulate if your permanent address is or you study in: " For Boston, the states listed are ME, NH, MA VT and RI. For NYC it's NY, NJ, CT, PA and DE. As Sara advised, a close review of the visa pages at the respective consulate sites will provide more information, including a link to the site where you can make an appointment. Just search for Spanish Consulate Boston or NYC. By the way, appointments are not easy to come by. In Boston, appointments are typically posted twice a month, two weeks at a time. Available appointments for the first two weeks of the month usually appear during the last week of the previous month, and during the second week of the month for the last two weeks of the month. And they go very quickly.

He has to go to NY because that is the district you're in. I don't believe they will accept you in NY. Although, unlike the Boston office, you are not required to make an appt at the NY office, but it is recommended that you go early. Go to the website for the NY office and they will have all the information there

Boston would be the closest one and they can work their visa there. Also, I think you need to make an appointment first. Go to their website (spanish consulate in Boston), and find out all the information.