Vilgelm Georgiyevich Knorin (Russian: Вильге́льм Гео́ргиевич Кно́рин, Latvian: Vilhelms "Vilis" Knoriņš; (1890–1939)) was the second First secretary of the Central Committee of the Byelorussian SSR from 1920 to 1923 and from 1927 to 1928. He was killed in the Great Purge as a part of the so-called "Latvian Operation".