Israel Isserlin (ישראל איסרלן; Israel Isserlein ben Petachia; 1390 in Maribor, Duchy of Styria – 1460 in Wiener Neustadt, Lower Austria) was a Talmudist, and Halakhist, best known for his Terumat HaDeshen, which served as one source for HaMapah, the component of the Shulkhan Arukh by Moses Isserles. He is also known as Israel of Neustadt, Israel of Marpurk, and Maharai.