- American Anti-Vivisection Society1
- American Humane Association5
- American Humane Education Society7
- American Humanitarian League1
- Angell, George T. (George Thorndike), 1823-19091
- Animal Relief and Humane Education League1
- Animal Rescue League of Boston3
- Audubon Society of Rhode Island1
- Bailey, C. A. M.1
- Barry, Etheldred B. (Etheldred Breeze), 1870-1
- Boston Work-Horse Relief Association1
- British Union for the Abolition of Vivisection1
- Cather, J. Leonard4
- Chase, J. Riley1
- Christian Home, The1
- Hampton, Louise1
- Hudson, John, Rev.1
- Hyatt, Edward1
- Kansas City Humane Society (Kansas City, Mo.)1
- Kendall, Georgiana1