Zhang Jun may refer to:
- Zhang Jun (prince) (307–346), ruler of the Former Liang state in ancient China during the Sixteen Kingdoms period
- Zhang Jun (chancellor) (died 904), Tang Dynasty chancellor
- Zhang Jun (general) (1097–1164), general of Song Dynasty
- Zhang Jun (economist) (born 1963), Chinese economist and Cheung Kong Professor of Economics at Fudan University
- Zhang Jun (badminton) (born 1977), Chinese badminton player
- Zhang Jun (athlete) (born 1983), Chinese shot putter
- Zhang Jun (judge), Vice President of the Supreme People's Court of China
- Zhang Jun (diver), Chinese diver