Sarg may refer to:

• Charles Sprague Sargent (1841–1927), American botanist (standard abbreviation for his name is "Sarg.")
• SARG — Syrian Arab Republic Government
• Searchable Arguments in the WHERE clause of a SQL database query.
• SARG04, a quantum key distribution protocol

Charles Sprague Sargent (April 24, 1841 – March 22, 1927) was an American botanist. He was appointed in 1872 as the first director of Harvard University's Arnold Arboretum in Boston, Massachusetts, and held the post until his death. He published several works of botany. The standard botanical author abbreviation Sarg. is applied to plants he identified.