Federal:

US Senators: http://www.senate.gov/senators/contact/

US House of Representatives Member: http://www.house.gov/representatives/find/

Sometimes when you enter your zip code, there is more than one representative who comes up. If that’s the case, you don’t have two representatives, you simply have to look closer at where the borders of each person’s district are.

State:

New York State Senate: https://www.nysenate.gov/find-my-senator

New York State Assembly: http://nyassembly.gov/mem/search/

Local:

New York City Council: http://council.nyc.gov/html/members/members.shtml