Guan is a surname.
Guan may also refer to:
- Guan (bird), of the family Cracidae in South and Central America
- Guan (instrument), a Chinese wind instrument
- Gu'an, Hebei, town in Hebei, China
- Gu'an County, in Hebei, China
- Guan County, Shandong, in China
- Guan County, Sichuan, current Dujiangyan City, in China
- Guan people, or Guang people, a people of modern Ghana
- People
- Guan Yu (160 – 219 CE), general of Shu Han during the Three Kingdoms era
- Guan Ping (? – 219), Guan Yu's son, also a general of Shu Han
- Guan Hanqing (c. 1241 – 1320), playwright
- Guan Zhong (? – 645 BCE), Legalist philosopher and politician
- Guan Pinghu (1897 - 1967), Chinese guqin musician