Ann Bancroft (born 29 September 1955 in Mendota Heights, Minnesota) is a United States author, teacher, and explorer. She was the first woman to successfully finish a number of arduous expeditions to the Arctic and Antarctic.

Ann Bancroft grew up in rural Minnesota. She described her family as one of risk takers. It is reported that she struggled with a learning disability, but nevertheless graduated from Saint Paul Academy and Summit School. Bancroft became a wilderness instructor and a gymnastics teacher in Minneapolis and St. Paul.

She gave up her teaching post in 1986 in order to participate with the "Will Steger International North Pole Expedition". She arrived at the North Pole together with five other team members after 56 days using dogsleds. This made Bancroft the first woman to reach the North Pole on foot and by sled.

She was also the first woman to ski across Greenland. In 1992 and 1993 Bancroft led an all-women expedition to the South Pole on skis. This expedition was the first group of women to reach the South Pole on skis. Her achievements led to her induction into the National Women's Hall of Fame for the United States.

Bancroft also received a number of other awards and honors. She lives in Minnesota near the St. Croix River. In 2006, she publicly campaigned against a proposed amendment to the state constitution to prohibit any legal recognition of marriages or civil unions between members of the same sex.