Collection
- Caraway family letters, 1927-19301
- Carnegie Foundation for the Advancement of Teaching collection, 1907-19441
- Charles Brewster Ross collection, 1874-19321
- Charles H. Foster collection, 1898-19671
- Charles Joseph Dyer papers, 1888-19371
- Charles W. Chase, Jr., and Harriet P. Chase papers, 1911-1939 (majority within 1912-1919)1
- Clark-McCreary papers, 1815-1936 (majority within 1846-1919)1
- Cole family papers, 1799-1959 (majority within 1821-1931)1
- Cornelia Hancock papers, 1862-1937 (majority within 1862-1865)1
- Cushing family collection, 1790-1934 (majority within 1828-1928)1
- Daniel Morgan collection, 1764-1951 (majority within 1764-1832)1
- David Nash collection, 1928-20081
- Demas Lindley Sears papers, 1916-1983 (majority within 1942-1946)1
- Douglas MacArthur collection, 1885-1983 (majority within 1917-1919)1
- Drury family collection, 1786-1990 (majority within 1786-1800)1
- DuBois-Ogden-McIlvaine family papers, 1786-1983 (majority within 1801-1877)1
- Dwight-Willard-Alden-Allen-Freeman family papers, 1752-19371
- Edward C. Randall papers, (majority within 1904-1935) 1922-19351
- Edwin O. Conklin collection, 1862-1940 (majority within 1862-1865)1
- Emily Howland papers, 1849-1974 (majority within 1850s-1920s)1