Cao may refer to:
Caodaism (Vietnamese: Đạo Cao Đài, Chữ nôm: 道高臺) is a monotheistic religion officially established in the city of Tây Ninh in southern Vietnam in 1926. The full name of the religion is Đại Đạo Tam Kỳ Phổ Độ (The Great Faith [for the] Third Universal Redemption).
Cao Bằng ( listen) is a province of the Northeast region of Vietnam. The province has borders with Hà Giang, Tuyên Quang, Bắc Kạn, and Lạng Sơn provinces within Vietnam.
Cao Wei (220–265) was one of the three major states that competed for supremacy over China in the Three Kingdoms period (220–280).
Cao Pi (187 – 29 June 226), courtesy name Zihuan, was the first emperor of the state of Cao Wei in the Three Kingdoms period.
Cao Văn Viên (December 21, 1921 – January 22, 2008) was a South Vietnamese soldier who served in the Army of the Republic of Vietnam (ARVN) and rose to the position of Chairman of the South Vietnamese Joint General Staff.
This article contains the family trees of members of the Cao clan, who ruled the state of Cao Wei (220-265) in the Three Kingdoms period (220-280) in China.
Cao Yupeng (Chinese: 曹宇鹏; pinyin: Cáo Yǔpéng; born October 27, 1990 in Guangzhou) is a professional snooker player from the People's Republic of China.