Appointed by the Assembly
| Name | Title | Date |
|---|---|---|
| Benjamin Franklin | Clerk of the Assembly | December 5, 1745 |
| Charles Norris | Keeper of the Books | December 26, 1754 |
Appointed by the Library Committee
| Name | Title | Dates |
|---|---|---|
| John Fisher | State Librarian | 1816-1819 |
| William Musgrave | State Librarian | 1819-1832 |
| James Wright | State Librarian | 1832-1839 |
| George R. Espy | State Librarian | 1839-1841 |
| E. P. Hughes | State Librarian | 1841-1842 |
| Henry K. Strong | State Librarian | 1842-1845 |
| Seth Salisbury | State Librarian | 1845-1849 |
| James Johnston | State Librarian | 1849-1850 |
| Thomas C. MacDowell | State Librarian | 1850-1852 |
| James Martin | State Librarian | 1852-1853 |
| William T. Sanders | State Librarian | 1853-1854 |
Appointed by the Governor
| Name | Title | Dates |
|---|---|---|
| Susan Banks | Deputy Secretary of Education, Commissioner of Libraries, and State Librarian | 2021 to present |
| Glenn R. Miller | Deputy Secretary of Education, Commissioner of Libraries, and State Librarian | 2015-2021 |
| Brian Dawson | Deputy Secretary of Education, Commissioner of Libraries, and State Librarian (Acting) | 2015-2015 |
| Stacey A. Aldrich | Deputy Secretary of Education, Commissioner of Libraries, and State Librarian | 2012-2015 |
| Alice L. Lubrecht | Deputy Secretary of Education, Commissioner of Libraries, and State Librarian (Acting) | 2012-2012 |
| Mary Clare Zales | Deputy Secretary of Education, Commissioner of Libraries, and State Librarian | 2004-2012 |
| Gary D. Wolfe | Deputy Secretary of Education, Commissioner of Libraries, and State Librarian | 1995-2003 |
| Sara Ann Parker | Deputy Secretary of Education, Commissioner of Libraries, and State Librarian | 1988-1995 |
| David R. Hoffman | State Librarian (Acting) | 1987-1988 |
| Elliot Shelkrot | State Librarian | 1980-1987 |
| Patricia Broderick | State Librarian (Acting) | 1978-1980 |
| Ernest E. Doerschuk, Jr. | State Librarian | 1964-1978 |
| Ralph Blasingame | State Librarian | 1957-1964 |
| Nell Stevens | State Librarian (Acting) | 1955-1957 |
| Douglas A. Portzline | State Librarian (Acting) | 1952-1955 |
| Alfred Decker Keator | State Librarian | 1940-1951 |
| Dr. Joseph L. Rafter | State Librarian | 1936-1940 |
| Dr. Charles F. Hoban | State Librarian and Director of Museum | 1935-1936 |
| Gertrude MacKinney | State Librarian | 1931-1935 |
| Frederic A. Godcharles | State Librarian | 1927-1931 |
| Anna Addams MacDonald | State Librarian and Director of Museum (Acting) | 1924-1927 |
| Rev. George P. Donehoo | State Librarian and Director of Museum | 1921-1924 |
| Thomas Lynch Montgomery | State Librarian and Director of Museum | 1903-1921 |
| George Edward Reed | State Librarian | 1898-1903 |
| William H. Egle | State Librarian | 1887-1898 |
| Edward Stuck | State Librarian | 1885-1887 |
| Rev. Charles J. Little | State Librarian | 1882-1885 |
| Rev. Charles L. Ehrenfeld | State Librarian | 1878-1882 |
| Rev. Obadiah H. Miller | State Librarian | 1872-1878 |
| Wein Forney | State Librarian | 1863-1872 |
| Rev. William R. DeWitt | State Librarian | 1854-1863 |