Challah (Hebrew: חלה, romanized: ḥallah, literally "Loaf") is the ninth tractate of Seder Zeraim, the Order of Seeds.

According to Maimonides' introduction to the Mishna, tractate Challah is arranged after the tractate of Ma'aser Sheni, "because after we take out all of these gifts – which are 'terumah' and maaser rishon and [maaser] sheni – then we grind it and make it into flour and knead it, and then we become obligated in 'challah.

In addition to the commentaries on the Mishnah, the Jerusalem Talmud and the Maimonides' rulings, Nachmanides wrote Halachot (like the rulings of Isaac Alfasi for the rest of the tractates), followed by Shlomo ibn Aderet and Asher ben Jehiel.

A special place is given Yom Tov Algazi's commentary on the Hilchot Challah of Nachmanides.

In addition, the poskim such as the Arba'ah Turim and the Shulchan Aruch and their commentators have written about Hilchot Challah in Yoreh De'ah.