Martha Haines Butt (after marriage, Bennett; November 22, 1833 – February 9, 1871) was an American proslavery author primarily known by her maiden name.

[3] During the period of 1847–50, Butt was educated at Patapsco Female Institute in Ellicott's Mills,[3] near Baltimore, and received her diploma there.

[4] Her 1853 novel, Antifanaticism: A Tale of the South, was a proslavery response to Harriet Beecher Stowe's anti-slavery book, Uncle Tom's Cabin.

[3] Martha Haines Butt died of pneumonia at the Grand Central Hotel, New York City, February 9, 1871.

[3][7] Butt's arm and hand were copied as a model by the artist William Randolph Barbee, of Virginia, for the statue of the Fisher Girl.