Loretta "Letty" Cottin Pogrebin (born June 9, 1939) is an American author, journalist, lecturer, and social activist. She earned a bachelor's degree from Brandeis University in English and American literature, and worked for the publishing company Bernard Geis Associates as their director of publicity and later their vice president. She also wrote a column for Ladies Home Journal called “The Working Woman," and was an editorial consultant for the TV special Free to Be... You and Me (as well as for the album and book associated with it) for which she earned an Emmy.

She was a founding editor of Ms. Magazine, and a cofounder of Ms. Foundation for Women and the National Women's Political Caucus.

In 1979, the Supersisters trading card set was produced and distributed; one of the cards featured Pogrebin's name and picture.

In 2009 she was diagnosed with breast cancer, which inspired her book How to Be a Friend to a Friend Who's Sick.

She was featured (among others) in the 2013 documentary film Makers: Women Who Make America.

Pogrebin is a life member of Hadassah, and in 2013 was awarded that year's Myrtle Wreath Award from Hadassah’s Southern New Jersey Region.

She is a board member of (among other organizations) the Director’s Council of the Women in Religion Program at the Harvard Divinity School, the Ms. Foundation for Education and Communication, and the Women's, Gender, and Sexuality Studies Program at Brandeis University.

She is the mother of identical twin daughters, Robin Pogrebin and Abigail Pogrebin, and a son, David. She is the grandmother of six.