Orrin is an English name with two possible sources: the Hebrew Oren, which means "pine tree", and the Irish Odhrán, "little pale one", the name of several early saints. It was fairly common in 19th-century New England and is remembered today from Senator Orrin Hatch of Utah. Orrin ranked number 2512 in the United States in 2000, reached number 1813 in 2015 and stood at number 2278 among boys in 2025.