Leanne Marshall (born October 10, 1980 in Yuba City, California) is a fashion designer from Portland, Oregon. She was the winner of season 5 of Project Runway.
Marshall is a graduate of The Fashion Institute of Design & Merchandising in San Francisco and a recipient of their Levi’s Dockers Fashion Designer of Tomorrow award.
Marshall started the show being in the bottom two in Episode 2, “The Grass Is Always Greener,” along with Wesley Nault. She went to the top 3, however, in the next episode, “Bright Lights, Big City,” and began to hit her stride midway through the competition. She won two challenges consecutively while having immunity: “Fashion that Drives You” and “Double 0 Fashion.”
Continuing through the remaining episodes with some tougher challenges, Marshall was able to gain a spot in the top 3 and showed her collection in the finale competing against Kenley Collins and Korto Momolu. Leanne’s final collection in the competition was well-received by the judges, and she was crowned the winner of Season 5.
Marshall began her runway fashion career in 2006 and 2007 at Portland Fashion Week in Portland, Oregon. 
Marshall created an eco-friendly line for bluefly.com that debuted in July 2009. She also designed a maternity dress for Heidi Klum.
Marshall showed her Fall 2009, Spring 2010, Fall 2010 and Fall 2011 collections at New York Fashion Week. She also creates one of a kind and custom wedding gowns for clients and has a design studio located in Brooklyn, NY. 
Marshall has most recently designed a series of dresses for Paula Abdul.