晉小子侯（前8世紀 - 前705年），姬姓，名字已失考，是春秋時期諸侯國晉國的國君，晉哀侯之子，晉國第十六任君主，前709年登位，在位4年。

當時曲沃日益強大，《史記》稱曲沃武公于小子四年（前705年）誘殺了晉小子侯，周桓王派兵伐曲沃武公，武公退回曲沃，周立晉哀侯之弟公子緡為晉侯。《左傳》稱晉小子侯于魯桓公七年（前705年）冬被殺，周于次年冬立公子緡為晉侯。

Marquis Xiaozi of Jin (晉小子侯 Jìn Xiǎozǐ Hóu), ancestral name Ji (姬), given name unknown, was the sixteenth ruler of the state of Jin. He was also the sixth ruler of Jin in the Spring and Autumn period. He reigned for four years.

In 705 BC, the fourth year of the reign of Marquis Xiaozi of Jin, Duke Wu of Quwo killed Marquis Xiaozi. King Huan of Zhou sent Guo Zhong (虢仲) to attack Duke Wu, and Duke Wu retreated to Quwo. King Huan of Zhou then installed Min, the uncle of Marquis Xiaozi, on the throne of Jin.