Judah Idel Scherschewsky (Yiddish: יהודה אידל שערשעווסקי; 1804 – 20 September 1866, Kovno) was a Lithuanian Talmudist and Hebraist.
After having studied Talmud and rabbinics under Jacob Meïr Yalovker, Scherschewski was employed in one of the business establishments in Vilna, where, in his spare hours, he occupied himself reading rabbinical works and studying the literature of the Haskalah movement.
Scherschewski was the author of Oz melekh (Vilna, 1857), a sermon and a hymn on the occasion of the coronation of Alexander II of Russia.
Several sermons of Scherschewski's are to be found in the Kovetz derushim, a collection of sermons preached by the teachers of the Vilna rabbinical seminary and published at the expense of the Russian government (Vilna, 1864).
He was a constant contributor to Ha-Karmel during the closing years of his life, and contributed many articles to various other Hebrew periodicals also.