Empress Zhang (張皇后, personal name unknown) was an empress of the Chinese/Qiang state Later Qin. Her husband was Yao Xing (Emperor Wenhuan).
Very little is known about Empress Zhang. She was promoted to empress from the imperial consort title Zhaoyi (昭儀) in 402. No further reference was made to her in history, including when she died or whether she had any children. (The succession chart below assumes that she survived to 412, when her successor Empress Qi was created empress, but this is obviously conjecture.)
References
Empress Zhang (Later Qin) Wikipedia(Text) CC BY-SA