- Yablonsky, Grigoriy (Soviet Union, born 1940)
- Yablonsky, Sergey (Russia/Soviet Union, 1924–1998)
- Yackel, Carolyn (?, ?–?)
- Yadrenko, Myhailo (Ukraine/Soviet Union, 1932–2004)
- Yaglom, Akiva (Soviet Union, 1921–2007)
- Yaglom, Isaak (Soviet Union, 1921–1988)
- Yajnavalkya (Ancient India, born circa 900 BC)
- Yakubovich, Vladimir (Soviet Union, 1926–2012)
- Yamabe, Hidehiko (Japan, 1923–1960)
- Yamamoto, Yutaka (Japan, ?–?)
- Yamashita, Michinori (?, born 1953)
- Yan, Catherine (China, ?–?)
- Yandell, Benjamin (?, 1951–2004)
- Yanenko, Nikolai Nikolaevich (Russia/Soviet Union, 1921–1984)
- Yang, Chung Tao (USA, 1923–2005)
- Yang, Grace (USA/China, ?–?)
- Yang, Jack (USA, ?–?)
- Yang, Paul C. (China, ?–?)
- Yang, Xin-She (Britain, ?–?)
- Yankov, Vadim (Soviet Union, born 1935)
- Yano, Kentaro (Japan, 1912–1993)
- Yanovskaya, Elena (Russia/Soviet Union, born 1938)
- Yanovskaya, Sofya (Soviet Union, 1896–1966)
- Yao, Frances (?, ?–?)
- Yaqubov, Mammad (Azerbaijan, born 1941)
- al-Yasamin, Ibn (Morocco, ?–1204)
- Yāska (Medieval India, ?–?)
- Yassemi, Siamak (Iran, ?–?)
- Yasuaki, Aida (?, ?–?)
- Yates, Frank (England, 1902–1994)
- Yates, Samuel (?, 1919–1991)
- Yativṛṣabha (Medieval India, ?–?)
- Yau, Horng-Tzer (USA/Taiwan, born 1959)
- Yau, Shing-Tung (China, born 1949)
- Yau, Stephen Shing-Toung (Hong Kong, born 1952)
- Yazdi, Muhammad Baqir (Persia, ?–?)
- de Yciar, Juan (Spain, 1523–1573)
- Ye, Jane (Canada, ?–?)
- Ye, Li (Medieval China, 1192–1279)
- Ye, Tian (China, ?–?)
- Ye, Yinyu (?, born 1948)
- Yeats, Karen (Canada, born 1980)
- Yefremovich, Vadim (Russia, 1903–1989)
- Yeganeh, Hamid Naderi (Iran, born 1990)
- Yekutieli, Amnon (Israel, born 1959)
- Yeldham, Florence (Britain, 1877–1945)
- Yeneng, Sun (Singapore, ?–?)
- Yershov, Yury (Russia/Soviet Union, born 1940)
- Yıldırım, Cem (Turkey, born 1961)
- Yin, Wotao (?, ?–?)
- Yin, Yiqun Lisa (China, ?–?)
- Ying, Lexing (China, ?–?)
- Yingming, Liu (China, 1940–2016)
- Yingshi, Li (China, ?–?)
- ben Yitzhaq, Elazar ben Tsedaka (?, 1927–2010)
- Yoccoz, Jean-Christophe (France, 1957–2016)
- Yogananda, C S (India, born 1960)
- Yoneda, Nobuo (Japan, 1930–1996)
- Yoneyama, Kunizo (Japan, 1877–1968)
- Yong-un, Kim (South Korea, 1927–2020)
- Yong, Cai (China, 132–192)
- Yong, Lam Lay (Singapore, born 1936)
- Yor, Marc (France, 1949–2014)
- Yoriyuki, Arima (Japan, 1714–1783)
- Yorke, James A. (?, born 1941)
- Yoshida, Ruriko (Japan/USA, ?–?)
- Yoshitoki, Takahashi (Japan, 1764–1804)
- Yosida, Kōsaku (Japan, 1909–1990)
- Youden, William J. (USA, 1900–1971)
- Young Jr., David M. (USA, 1923–2008)
- Young, Alfred (Britain, 1873–1940)
- Young, Allyn Abbott (USA, 1876–1929)
- Young, Anna Irwin (USA, 1873–1920)
- Young, Arthur (England, 1741–1820)
- Young, Grace Chisholm (England, 1868–1944)
- Young, John Radford (?, 1799–1885)
- Young, John Wesley (USA, 1879–1932)
- Young, Lai-Sang (China, born 1952)
- Young, Laurence Chisholm (British, 1905–2000)
- Young, Mabel Minerva (USA, 1872–1963)
- Young, Matthew (Ireland, 1750–1800)
- Young, Nicholas (British, ?–?)
- Young, William Henry (Britain, 1863–1942)
- Youngs, John William Theodore (USA, 1910–1970)
- Yu, Bin (USA/China, ?–?)
- Yu, Guoliang (USA/China, ?–?)
- Yu, Shih-Hsien (Taiwan, born 1964)
- Yuan, Ruan (?, 1764–1849)
- Yuan, Wang (China, born 1930)
- Yuan, Xinyi (China, ?–?)
- Yuanhua, Sun (China, 1580s–1632)
- Yue, Xu (Ancient China, ?–?)
- Yuguang, Shi (?, ?–?)
- Yui, Noriko (Canada/Japan, ?–?)
- Yule, Udny (Britain, 1871–1951)
- Yulmukhametov, Rinad (Russia/Soviet Union, born 1957)
- ibn Yumn, Nazif (Medieval Iraq, ?–990)
- Yun, Louis Chen Hsiao (?, ?–?)
- Yun, Zhiwei (China, born 1982)
- Yunus, Ibn (Medieval Egypt/Medieval Arabia, 950–1009)
- Yushkevich, Adolph P. (Soviet Union, 1906–1993)
- Yusubov, Ismikhan (Azerbaijan, born 1945)
- ibn Yūsuf ibn Maṭar, Al-Ḥajjāj (Medieval Arabia, 786–833)
- ibn Yusuf, Ahmad (Medieval Arabia/Medieval Egypt/Medieval Syria/Medieval Iraq, 835–912)
- Yvinec, Mariette (France, ?–?)
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