Yoreh De'ah (Hebrew: יורה דעה) is a section of Rabbi Jacob ben Asher's compilation of halakha (Jewish law), the Arba'ah Turim, written around 1300.

This section treats all aspects of Jewish law not pertinent to the Hebrew calendar, finance, torts, marriage, divorce, or sexual conduct. (Nevertheless there exists occasional overlap other areas). Yoreh De'ah is therefore the most diversified area of Jewish law; see aside.

Later, Rabbi Yosef Karo modeled the framework of his own compilation of practical Jewish law, the Shulchan Aruch, after the Arba'ah Turim. Many later commentators used this framework, as well. Thus, Yoreh De'ah in common usage may refer to the latter work. Ben Asher's Yoreh De'ah was also a key source for Ha-Agur (The Collection) by Jacob ben Judah Landau.