Preston Gannaway (b. 1977) is an American documentary photographer and artist. For 20 years, she has focused on intimate stories about American families and marginalized communities while addressing themes such as gender identity, class and our relationship to the landscape. Gannaway is best known for her long-term projects like Remember Me, which was awarded the 2008 Pulitzer Prize for feature photography.

In 2014 she released her first book, Between the Devil and the Deep Blue Sea, about the changing character of a seaside neighborhood in Virginia. Her photographs are held in both public and private collections. They have been shown in solo and group exhibitions in venues around the world including the Everson Museum of Art, Griffin Museum of Photography, Ogden Museum of Southern Art, Museum of Contemporary Art Georgia and San Francisco International Airport Museum.

She was a Light Work artist in residence in 2018 and a Pollner Distinguished Professor at the University of Montana in 2019. In addition to long-term projects, she does editorial commissions for publications such as The New Yorker, California Sunday Magazine, Mother Jones and ESPN.

Gannaway is a regular lecturer and serves on the Board of Directors of Women Photograph. Born and raised in North Carolina, she is based in Sonoma County, California.