Mi Fang (died 223), courtesy name Zifang, was a Chinese military general and politician serving under the warlord Liu Bei in the late Eastern Han dynasty.
In 219, Mi Fang surrendered to Liu Bei's ally-turned rival Sun Quan, directly resulting in the loss of Jing Province (covering present-day Hubei and Hunan) and the death of Guan Yu.
The Australian Sinologist Rafe de Crespigny notes that Mi Fang had the remarkable record of serving each of the leaders of the Three Kingdoms during his lifetime.
Thereafter, the Mi brothers joined Liu Bei's army to Xuyi and Huaiyin (淮陰; in Guangling, south of Xu Province) to counter-attack the warlord Yuan Shu in 196.
Faced with enemies on both sides and a lack of supplies, the Mi brothers encouraged Liu Bei and used their personal wealth to support the army.
Liu Bei moved his camp to Xiaopei (小沛, in modern Pei County, Jiangsu) where he was financially supported by the Mi brothers to rebuild his army, gathering over 10,000 men.
Mi Fang received letters from Sun Quan, who was also a brother-in-law to Liu Bei, who was also angered by Guan Yu's insolence.
Mi Fang was not only blackened by Yang Xi (楊戲) of Shu Han for his betrayal, but had also been derided by Yu Fan of Eastern Wu for the very same reason.
Mi Fang then served under He Qi as a commander, along with another two generals named Liu Shao (劉邵, not to be confused with 劉劭) and Xianyu Dan (鮮于丹).
In the 14th-century historical novel Romance of the Three Kingdoms, both Mi Fang and Shi Ren (erroneously referred to as "Fu Shiren" in the novel) served in the Eastern Wu military after they surrendered to Sun Quan.