Aharon ben Joseph haLevi (Hebrew: אהרון הלוי‎; 1235 – c. 1290), known by his Hebrew acronym Ra'aH (רא"ה‎), was a medieval rabbi, Talmudic scholar and Halakhist.

Aharon haLevi was born in Girona, Catalonia (present-day Spain) in 1235 to his father Rabbi Joseph ha-Levi, son of Rabbi Benveniste ha-Levi, son of Rabbi Joseph ha-Levi, who was the son of Rabbi Zerachiah ha-Levi of Girona Baal Hamaor. The Ra'ah's mother Clara, was a granddaughter of Rabbi Aaron of Lunel who was the son of Rabbi Meshullam ben Jacob of Lunel ("Rabbenu Meshullam hagadol").

Aharon haLevi studied under his father Rabbi Joseph ha-Levi and brother Rabbi Pinchas ben Joseph ha-Levi, as well as Nachmanides and was a colleague of Rabbi Shlomo ben Aderet (1235–1310). He published critical notes on the Rashba's Torat HaBayith, which he entitled Bedek HaBayith. He also wrote a commentary on the Talmud, select parts of which have been published.

The sixteenth century author Gedaliah ibn Yaḥyah also credited ha-Levi as the author of the anonymous Sefer ha-Chinuch ("Book of Education"), although this claim has been rejected by many scholars due to discrepancies between opinions expressed in Bedek HaBayith and the Chinuch.^[1][2] This has led to the conclusion that the true author of the Sefer ha-Chinuch was a different "Aaron ha-levi of Barcelona", who was a student of Shlomo ben Aderet, rather than his colleague.^[3][4] More recently, Professor Israel Ta-Shma of the Hebrew University of Jerusalem has presented that the author of "Sefer ha-Chinuch" was in fact Rabbi Aaron's brother, Pinchas ben Joseph ha-Levi, who had written the work for his son, Joshua.^[5]

Rabbi Yom Tov Asevilli was one of Aharon HaLevi's students.