Zhang Zuo (Chinese: 張祚; died 355), courtesy name Taibo (太伯), formally Prince Wei of (Former) Liang ((前)涼威王) was a ruler of the Chinese state Former Liang. He was the only ruler of Former Liang to formally declare a break from Jin Dynasty (266–420), and historical sources variously report him as having declared himself an emperor (per Jin Shu) or a prince (per Zizhi Tongjian). He was commonly viewed as a usurper (having seized the throne from his nephew Zhang Yaoling after his brother Zhang Chonghua's death) and initially not acknowledged as a Former Liang ruler, but his brother Zhang Tianxi later nevertheless gave him the posthumous name of Wei.
