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.
She represented Australia at the 2010 Pan Pacific Swimming Championships, where she took bronze in the 200-metre and 400-metre freestyle, and silver in the 4×200-metre freestyle.
She represented Australia at the 2010 Commonwealth Games, winning a gold medal in the 4×200-metre freestyle relay, finishing sixth in the 200-metre freestyle, finishing fifth in the 800-metre freestyle, and finishing fourth in the 400-metre individual medley.