FY 2014 Public Libraries Survey

Source: Institute of Museum and Library Services, 2016

From the press release:
Today, the Institute of Museum and Library Services released the data for the FY 2014 Public Libraries Survey. Accompanying FY 2014 data are new online visualizations and tools to make the data easier to explore and use.

Since 1988, the annual Public Libraries Survey has provided a national census of public libraries in the United States. The data are collected from approximately 9,000 public library systems comprised of over 17,000 individual main libraries, library branches, and bookmobiles in the 50 states, the District of Columbia, and outlying territories.

From the summary:
The 2014 PLS shows libraries continuing to adapt to 21st century needs and a growing population. More than 306 million Americans lived within a public library service area in 2014, compared to 305 million in 2013. Libraries offered more children and young adult programs, with an estimated 5 million more Americans attending library programs compared to the previous year. In addition, the number of downloadable audio, video, and electronic books available to the public grew significantly.
Data Files (CSV and SAS formats)
APIs (State Summary (link is external), Administrative Entity (link is external), and Outlet (link is external) datasets)
Documentation
Supplementary Tables
Data Element Definitions