- Councilman, W. T. (William Thomas), 1854-1933, author1
- Cowles, Edward, 1837-19191
- Crandall, Floyd M. (Floyd Milford), 1858-1919, author1
- Crile, George Washington, 1864-1943, author1
- Cross, Charles R. (Charles Robert), 1848-1921, author1
- Cuesta, Carlos, active 1891, author1
- Culver, Everett M.1
- Currier, Andrew F. (Andrew Fay), 1851-1937 author1
- Currier, C. Gilman (Charles Gilman)1
- Cushing, Clinton, 1840-1
- Cutler, Elbridge Gerry, 1846-1929 author1
- Cutter, Ephraim, 1832-1917 author1
- D. Ransom, Son & Co., author.1
- Dabney, William C. (William Cecil), 1849-18941
- Dallas, Alexander, 1850- author1
- Daniel, Z. T., author1
- Davis, Edward P. (Edward Parker), 1856-1937, author1
- Davis, N. S. (Nathan Smith), 1858-19201
- Davis, W. E. B. (William Elias Brownlee), 1863-1903, author1
- District of Columbia. Health Department, author.1