Blair Catherine Evans (born 3 April 1991) is an Australian middle distance freestyle swimmer.

Evans made her international debut for Australia at the 2009 World Aquatics Championships where she competed in the 800-metre freestyle, after winning her first senior national title in that event in that year.

At the 2011 World Championships, she was part of the Australian 4 x 200 m women's team that won silver.

Although she did not swim in the final, her team came in second with a time of 7:44.41,[4] therefore Evans won a silver medal.

At the 2016 Summer Olympics, Evans placed seventh in Heat 5 of the Women's 400m Individual Medley with a time of 4:38.91.