2023–24 LEN Women's Challenger Cup

2023–24 LEN Women's Challenger Cup
The Bazen Mladost in Zagreb hosted the Final six.
LeagueLEN Women's Challenger Cup
SportWater polo
Duration19 October 2023 – 26 November 2023
Number of games35
Number of teams14
Finals champions Izmir BB GSK (1st title)
  Runners-up ZVK Crvena Zvezda

The 2023–24 LEN Women's Challenger Cup was the inaugural edition of the new water polo competition organised by the Ligue Européenne de Natation (LEN). It acted as the third tier, below the LEN Women's Champions League and the LEN Women's Euro Cup.

Izmir BB GSK won the inaugural competition, beating ZVK Crvena Zvezda 10–9 in the final. Izmir BB GSK became the first Turkish club to win a European club water polo competition.