- Records of YMCA International Work in the Philippines (280)
- Records of YMCA Work in England and the United Kingdom (605)
- Records of YMCA Work with American Indians (68)
- Records of YMCA Work with Women, Girls, and Families (142)
- Records of the YMCA of the City of New York (6)
- Resort Discrimination Records (66)
- Rev. Kenneth Dexter Miller Papers (139)
- Richard C. Morse Papers (3)
- Richard D. Cooper China Diary and Other Papers (1)
- Richard Harris Papers (1)
- Richard Maurice Elliott Papers (282)
- Robert McBurney Papers (1)
- Romanian American Collection (1)
- Rose Muckley Papers (1)
- Russell N. Service Papers (5)