Lesley Simpson (née Brett; born 15 March 1968) is a former New Zealand rugby union player.

She made her Black Ferns debut at RugbyFest 1990 against Netherlands.

Brett competed at the 1991 Women's Rugby World Cup;[1] she scored a hat-trick in their game against Wales.

[2] Brett is the mother of former Crusaders and Blues fly-half, Stephen Brett.

[3] She was married to former All Black, Victor Simpson.