- Yellow Birch (1)
- Yellow Crowned Night Heron (1)
- Yellow River Basin (1)
- Yellow Robe, Wiliam S, Jr (1)
- Yellow Sea (1)
- Yellow Whitlow Grass (1)
- Yergan Family (1)
- Yergan, Max, 1892 1975 (18)
- Yergan, Max, 1894 1975 (4)
- Yerkes, Robert Mearns, 1876 1956 (271)
- Yicheng Xian (Shanxi) History Sources (2)
- Yiddish (1)
- Yiddish, Fraternal Organizations (2)
- Yidu Xian (Hubei) History Sources (1)
- Yifeng Xian (Henan) History Sources (4)
- Yiling Zhou (Hubei) History Sources (1)
- Yinghua Academy (2)
- Yingshan Xian (Sichuan) History Sources (5)
- Yingzhou (Anhui) History Sources (1)
- Yizhen Xian (Jiangsu) History Sources (10)
- Ymca (61)
- Ymca Camps (48)
- Ymca Historical Library (1)
- Ymca Immigration Work (2)
- Ymca Institute in Hong Kong (141)
