The 2017–18 Women's National Cricket League season was the 22nd season of the Women's National Cricket League, the women's domestic limited overs cricket competition in Australia. The tournament started on 6 October 2017 and finished on 24 February 2018. Defending champions New South Wales Breakers won the tournament for the 19th time after topping the ladder and beating Western Fury in the final.

The New South Wales Women cricket team, also known as the New South Wales Breakers, is the women's representative cricket team for the Australian State of New South Wales. They play most of their home games at North Sydney Oval and they also use Hurstville Oval, Sydney and Blacktown ISP Oval, Sydney. They compete in the Women's National Cricket League (WNCL), the premier 50-over women's cricket tournament in Australia, and are by far its most successful team, having won 20 titles. They previously played in the now-defunct Australian Women's Twenty20 Cup and Australian Women's Cricket Championships.