Zhang Gongjin (594[1] – 632), courtesy name Hongshen, titled Duke of Tan, was an official and general during the Tang dynasty of China.

He played an important role in the Xuanwu Gate Incident in 626 which helped Emperor Taizong obtained the crown.

During Emperor Taizong's reign, Zhang Gongjin was a military commander guarding Daizhou, an important city in the north of Tang empire.

The Illig Qaghan was captured by Tang dynasty in the following year, which marked the collapse of the Eastern Turkic Khanate.

In folk legends, Zhang Gongjin was a low-ranked officer under Luo Yi, the general guarding Youzhou in Sui dynasty.