Mary Louise Boynton (1868 – March 3, 1951) was an American newspaper publisher and editor.

[2][3] In 1897, Boynton and her sister Georgie[4] bought a New Jersey newspaper, the Perth Amboy Republican,[5] and ran it as a daily newspaper until 1903,[6] with Louise Boynton as editor in chief.

[10] From 1905, Boynton was closely associated with actress Maude Adams, usually described as her personal secretary.

[11][12] A 1913 profile of Adams in Good Housekeeping elaborated, calling Boynton "a companion who is consulted on every momentous question of costume or farm produce; who is present at the trial of every stage effect and is the companion of every country drive; a true helpmeet in the small things of life as well as in the large.

[15] Their graves are under a shared headstone, on the grounds of the Cenacle Convent in Ronkonkoma, Long Island.