The 2023–24 ISU Challenger Series was held from September to December 2023.
It was the tenth season that the ISU Challenger Series, a group of senior-level international figure skating competitions, was held.
This season, the series included the following events.
Skaters were eligible to compete on the Challenger Series if they had reached the age of 16 before July 1, 2023.
The ISU Challenger Series rankings were formed by combining the two highest final scores of each skater or team.