Kaiyuan Subdistrict () is a subdistrict of Siming District, Xiamen, Fujian Province, People's Republic of China. It covers an area of and has a registered population of 63,362.
It is located in central Xiamen Island, north of the original Siming District and south of Huli District. It is named after a street meaning "Initiating the First (Year)".
In October 1945, Kaiyuan was created as a district (Kaiyuan District éÂÂå ÂÃ¥ÂÂ) along with Zhongxin District (), Gulangyu District () and Heshan District (). In August 1966, it was renamed Dongfeng (lit. East Wind) District (), but this was reverted in October 1979. Finally, in April 2003, Kaiyuan and Gulangyu Districts were merged into Siming District.