List of the largest libraries in the United States
The largest public library in the United States—and the largest library in the world—is the Library of Congress in Washington, D.C., which is the "de facto" national library of the United States. It holds more than 167 million items, including "more than 39 million books and other printed materials, 3.6 million recordings, 14.8 million photographs, 5.5 million maps, 8.1 million pieces of sheet music and 72 million manuscripts." Other than the Library of Congress, the largest public library in the United States is the New York Public Library, while the largest research library in the United States is the Harvard Library.
Mid-Continent Public Library
Mid-Continent Public Library is the largest public library system in the U.S. state of Missouri by number of volumes and size of budget. Its collection ranks among the 100 largest libraries in America, which includes university, public, and private collections, and is among the nation's 20 largest public library systems. (Note: The Kansas City Public Library is a separate library system with facilities primarily serving Kansas City in Jackson County, Missouri.)