How many libraries are there in the US?

122,566.

The American Library Association (ALA) estimates there are 122,566 libraries in the US: 9,214 public, 3,827 academic, 99,180 school libraries, 8,906 special libraries, 289 Armed Force libraries and 1,150 government libraries. The largest library in America is the Library of Congress, with over 32 million volumes, followed by Harvard University and Boston Public Library, both having over 15 million volumes.