Juhn Guang Liou is a Taiwanese geologist.
Liou attended Hsinchu Senior High School and National Taiwan University, where he worked as a research assistant to Academia Sinica member V. C. Juan alongside high school classmate Bor-ming Jahn.
In 1978, Liou was named a fellow of the Mineralogical Society of America and awarded a Guggenheim Fellowship.
The Geological Society of America granted Liou fellowship in 1979.
He retired from Stanford in 2005, and was awarded the Roebling Medal in 2011.