Located in Mariposa, Calif., Mariposa County Library is one of the largest libraries and has four branch libraries. It is a member of the San Joaquin Valley Library System and the Heartland Region of the Library of California. The company offers a wide range of services, such as senior services, young adult services, childrens services, homebound directory, internet orientation, library tours and community services. It has more than 50,000 items. Through interlibrary loan additional items can be borrowed from libraries throughout California and the U.S.