| 1839/40 | William Cutter Tenney, [1841], AB 1838; Joseph Osgood, 1842 |
| 1840/41 | Thomas Dawes, 1842 |
| 1841/42 | Frederic Hinckley, 1843 |
| 1842/43 | Edmund Burke Willson, 1843 |
| 1843/44 | Edward Capen, 1845 (librarian, Boston Public Library, 1852-1874; librarian, Haverhill Public Library, 1874-1901, emeritus after 1899) |
| 1845/46-1846/47 | George Faber Clark, 1846 |
| 1847/48 | Augustus Woodbury, 1849 |
| 1848/49 | Amory Battles, 1850 |
| 1849/50 | Adam Ayer, 1851 |
| 1850/51-1851/52 | Rushton Dashwood Burr, 1852 |
| 1852/53 | Calvin Stoughton Locke, 1854 |
| 1853/54 | Charles Taylor Canfield, 1855 |
| 1854/55 | George Franklin Allen, 1855 |
| 1855/56-1856/57 | George Washington Bartlett, 1857 |
| 1857/58-1858/59 | Charles Ammi Cutter, 1859. Charles Ammi Cutter received his AB from Harvard in 1855 and completed the course of study at the Divinity School in 1859. While a student at the Divinity School, he served as its librarian. After serving as assistant to the librarian of Harvard, he was the librarian of the Boston Athenaeum, 1868-1893, and then librarian of Forbes Library, Northampton, Massachusetts, from 1893 until his death. His Rules for a Dictionary Catalog (1st ed., 1875) and his Expansive Classification (1st ed., 1891) are classic works in modern library science. |
| 1859/60-1860/61 | Augustus Mellen Haskell, 1861 |
| 1861/62-1862/63 | David Henry Montgomery, 1863 |
| 1863/64 | Calvin Stebbins, [1865] |
| 1866/67-1868/69 | Benjamin Franklin McDaniel, 1869 |
| 1869/70-1870/71 | Nicholas Paine Gilman, 1871 |
| 1876/77 | Cyrus William Christy, 1875 |
| 1877/78 | Frederick Meakin, 1878 |
| 1878/79-1879/80 | Charles Brown Elder, 1880 |
| 1879/80-1881/82 | Charles Jason Staples, 1881 |
| 1882/83-1883/84 | Arthur Anderson Brooks, 1884 |
| 1883/84-1884/85 | Horace Leslie Wheeler, 1885 |
| 1885/86-1886/87 | Merle St. Croix Wright, 1887 |
