Yisrael Lifschitz (Hebrew: ישראל ליפשיץ‏; 1782–1860) was a leading 19th-century Ashkenazi rabbi, first in Dessau and then in the Jewish Community of Danzig.

Lipshitz led the life of an ascetic, frequently fasted three days in succession, and studied incessantly.

His ethical will (published in Konigsberg in 1860 or 1861)[1] contains twenty-eight paragraphs, consisting chiefly of moral and ascetic precepts.

He left in manuscript many notes ("derashos") to the Shulchan Aruch and to Maimonides' (Rambam's) Mishneh Torah, a comprehensive treatise on the order Taharos, and many responsa.

He also wrote Derush Ohr HaChayim (Homily on the Light of Life) which debates the eternality of the soul and the age of the universe.