Massachusetts Library System was created in 2010.
Central Massachusetts Regional Library System was created in 1963.
State Library of Massachusetts was created in 1826.
Massachusetts Board of Library Commissioners was created in 1890.
Shortgrass Library System was created in 1988.
Metropolitan Library System was created in 1966.
Peninsula Library System was created in 1971.
Bay County Library System was created in 1974.
King County Library System was created in 1942.
Twin Lakes Library System was created in 1938.
Library System of Lancaster County was created in 1987.
Pierce County Library System was created in 1946.
Orange County Library System was created in 1923.