The winghead shark (Eusphyra blochii) is listed as critically endangered by the IUCN Red List due to population declines and localised extinctions potentially occurring throughout the Indo-West Pacific. Robust life history data is necessary to assess the status of endangered species, yet fundamental data on life history characteristics for this species, such as age and growth, remain extremely limited. To date only one study has formally estimated age and growth for winghead sharks, with a sample size of just 14 individuals from Queensland, Australia. This study determined age and growth estimates for winghead shark populations from the Northern Territory (NT), Australia, using vertebral band reading and incorporating a multi-model statistical framework using Bayesian growth methods (n = 86). Growth curves for the Northern Territory population were compared to those for Queensland populations to assess regional variation in life history traits. Due to a more robust sample size, sex-specific growth rates were examined for this species for the first time. Back calculation was used to overcome and address the under-sampling of smaller individuals. Producing age and growth information for the NT population will support more informed population assessments for winghead sharks, indicating whether existing management measures are effective.