Betty Maria Carolina Pettersson (Visby 14 September 1838–7 February Stockholm 1885), was a Swedish teacher.

Pettersson was accepted as a student the same year, though she did not begin her studies on the first attempt.

She was met with a great deal of dislike from many male fellow students.

After graduation, she worked as a teacher at a Gymnasium (school) for boys, the Ladugårdslands lägre elementarläroverk, from 1877 until 1884.

As a teacher, she was described: "To this her call she gave her entire soul; further more, she had the ability, in a very high degree, to win the trust and affection of her pupils and through this she influenced their conduct in no less degree; her class was always notable for its good order and conduct.