Rabbi Yaakov of Orléans, also called "Rabbeinu Tam of Orléans" or "Rabbeinu Yaakov HaKadosh", was one of the French Tosafists of the twelfth century. He was among the most distinguished students of Rabbeinu Tam and was often called by his teacher's name.

He lived in Orléans at least until 1171 and later moved to London, probably to serve as a teacher at the invitation of the community.

His comments are frequently cited in the Tosafot printed with the Talmud and in the halachic works of the Rishonim. Among his known rulings: in particularly severe cold one may ask a non-Jew to light the stove on Shabbat, since even a healthy person may fall ill from the cold; later authorities adopted this leniency. He also wrote glosses on the Pentateuch, preserved in Pa'aneach Raza and Minchat Yehudah, and some attribute to him Tosafot on Rashi's Torah commentary published under his teacher's name. According to Seder HaDorot, the ethical work Sefer HaYashar is also attributed to him.

He was killed in the anti-Jewish riots in London on the day of the coronation of King Richard the Lionheart, 19 Elul 4949 (3 September 1189). The Hebrew chronicle of Yerachmeel records that there "the eminent Rav, Rabbi Yaakov of Orléans, was killed for the sanctification of the Name". Others write that he was among those who took their own lives rather than submit to forced baptism.