江崎玲于奈（日语：江崎 玲于奈／えさき れおな，1925年3月12日－），罗马拼音Leo Esaki（レオ・エサキ），是一位日本物理学家。曾任IBM研究员以及筑波大学、芝浦工业大学、横滨药科大学校长等职。文化勋章获得者。叙勲一等旭日大绶章。

江崎是日本仅有的诺贝尔物理学奖（1973年）暨IEEE荣誉奖章（1991年）双料得主。他借由穿隧效应发明了江崎二极管（又称穿隧效应二极管，与东京通信工业株式会社合作完成），此外也是超晶格研究的先驱（与IBM合作）。

Reona Esaki (江崎 玲於奈 Esaki Reona, born March 12, 1925), also known as Leo Esaki, is a Japanese physicist who shared the Nobel Prize in Physics in 1973 with Ivar Giaever and Brian David Josephson for his discovery of the phenomenon of electron tunneling. He is known for his invention of the Esaki diode, which exploited that phenomenon. This research was done when he was with Tokyo Tsushin Kogyo (now known as Sony). He has also contributed in being a pioneer of the semiconductor superlattice while he was with IBM.