Lake County Public Library is the highest public library in North America at over 10,000 feet in altitude, located in the historic mining city of Leadville, Colorado. The library houses the rare and interesting Colorado Mountain History Collection of local history and genealogy, documenting the unique history of this "Boom Town," at its peak called the wealthiest mining camp in the world. The library began with a meeting of the town's citizenry on March 12, 1897, forming the Leadville Public Library Association with Mary Louise Stickley as President and sixty-five charter members.

After receiving a $20,000 donation from the Andrew Carnegie Foundation, the cornerstone was laid on October 25, 1902, with Miss Zoe Guernsey as the first librarian. In 1947, the library became a county library under the 1947 Library Act to receive county funding, becoming Lake County Public Library on December 1, 1947. A new facility opened on May 5, 1971, containing over 700 square feet with space for over 20,000 volumes and a public meeting room.

The Leadville Room was added in 1983 in 1880's Victorian style, housing the Colorado Mountain History Collection with genealogy and local history documents, Leadville city directories, Lake County Census schedules, cemetery directories and maps, and other non-circulating research resources.