The Chiba clan (千葉氏 Chiba-shi) was a Japanese gōzoku and samurai family descending from the Taira clan. The clan was founded by , the son of Taira no Tadatsune. The Chiba governed in Shimōsa Province, and the clan was based in present-day Chiba City. Additionally, for a period, the clan controlled the Sōma Manor that extended into present-day Ibaraki. After the establishment of the Kamakura shogunate, the head of the Chiba clan became the hereditary shugo governor of Shimōsa Province.