Margaret Clark Formby (July 12, 1929–April 10, 2003) was the daughter of southwest Texas ranchers who founded the National Cowgirl Museum and Hall of Fame in the basement of the public library in Hereford in Deaf Smith County before she relocated the collection to Fort Worth.Formby was born to Fred and Mabel Clark in Van Horn in Culberson County east of El Paso. She once described her upbringing as "growing up western", and she fought to recognize women for their influence in western culture.