90 Church Street is a federal office building in Lower Manhattan in New York City.

The building houses the United States Postal Service's Church Street Station, which is responsible for the 10007 ZIP code.

The AIA Guide to New York City described the building as "a boring limestone monolith that has trouble deciding between a heritage of stripped down neo-Classical and a new breath of Art Deco.

[6] During recovery efforts at Ground Zero, the United States Postal Service worked to return individual pieces of mail found by rescue workers to the addressees.

[8] Church Street Station also serves the 10007 ZIP code, covering portions of Battery Park City, Tribeca, and Civic Center.