Grigory Nikolayevich Neujmin (Russian: Григорий Николаевич Неуймин; January 3 1886 [O.S. December 22, 1885]–December 17, 1946) was a Soviet/Russian astronomer.
He is credited with the discovery of 74 asteroids, and notably 951 Gaspra and 762 Pulcova. The Minor Planet Center credits his discoveries under the name G. N. Neujmin, and his surname appears this way in the literature. However, the modern English transliteration of his name would be Neuymin.
He also discovered or co-discovered a number of periodic comets, including 25D/Neujmin, 28P/Neujmin, 42P/Neujmin, 57P/du Toit-Neujmin-Delporte and 58P/Jackson-Neujmin. The lunar crater Neujmin is named in his honour, as is the asteroid 1129 Neujmina.