What currency does new york use

I think there may be a bit of confusion here!

New York is a state in the United States, and as such, it uses the United States dollar (USD) as its official currency. This is the same currency used by the entire United States, not just New York.

In fact, the United States is one of the few countries in the world that uses a single national currency, which is the US dollar.

So, to answer your question, New York (or any other state in the US) does not have its own unique currency. It uses the US dollar, just like the rest of the country.