Augusta Amherst Austen (2 August 1827 – 5 August 1877) was a British organist and composer, chiefly of hymn tunes.
Austen was born in London, and studied at the Royal Academy of Music.
She composed various hymn tunes, of which one, "St. Agnes", was published in Charles Steggall's Church Psalmody (1849).
She married Thomas Anstey Guthrie shortly after leaving Paddington Chapel.
One of her sons, also named Thomas Anstey Guthrie, became a well-known novelist.