
Auraria Library is an academic library in downtown Denver, Colorado. It provides academic resources and research experiences to students, staff, and faculty at the University of Colorado Denver, the Metropolitan State University of Denver, and the Community College of Denver (CCD) on the Auraria Higher Education Center (AHEC) campus, also called the Auraria Campus. The Library is administratively operated by CU Denver and occupies a building owned by the State of Colorado.
The Carnegie Public Library in Rocky Ford, Colorado is a Carnegie library built in 1908. It was listed on the National Register of Historic Places in 1995.
The Fruita Museum, at 432 E. Aspen in Fruita, Colorado, is a Rustic-style building which was built in 1938-39 as a Works Progress Administration project to serve as a museum. It was listed on the National Register of Historic Places in 1996. In 2018, the building serves as home of the Fruita Area Chamber of Commerce and as a visitor center.
The W. E. Heginbotham House, located at 539 S. Baxter in Holyoke, Colorado serves as Holyoke's public library and is known as Heginbotham Library. It is a historic building, was built during 1919–1921, and is listed on the National Register of Historic Places.
The Monte Vista Library, at 110 Jefferson St. in Monte Vista, Colorado, was built in 1895. It was listed on the National Register of Historic Places in 1995.

The Old Colorado City Library is a currently operating branch library of the Pikes Peak Library District. It is housed in a 1904 Carnegie Library that has been in continuous service as a library since opening December 7, 1904. The library is located at 2418 West Pikes Peak Avenue, Colorado Springs, Colorado, 80904, in the historic district of Old Colorado City. Current hours of operation, policies, and programming can be found through the Pikes Peak Library District website.

The Ouray City Hall and Walsh Library are a pair of buildings in downtown Ouray, Colorado, United States. Located on 6th Avenue between 3rd and 4th Streets, they are together listed on the National Register of Historic Places.

The Salida Regional Library is a public library in Salida, Colorado and serves a regional population in southern Chaffee County, Colorado. The library was constructed in 1908 with funds from industrialist Andrew Carnegie and is currently part of the Marmot Library System.
The Sterling Public Library, at 210 S. 4th St. in Sterling, Colorado, was built in 1918. It was listed on the National Register of Historic Places in 2001.

The United States Geological Survey Library is a program within the United States Geological Survey, a scientific bureau within the Department of Interior of the United States government. The USGS operates as a fact-finding research organization with no regulatory responsibility.