The 2023 Castrol Toyota Formula Regional Oceania Championship was the inaugural season of the Formula Regional Oceania Championship. It was originally planned to be the eighteenth running of the Toyota Racing Series, the premier open-wheel motorsport category held in New Zealand, before the series was rebranded to become a fully FIA-certified Formula Regional championship.[1] It was held over five consecutive weekends in January and February 2023.
Charlie Wurz, driving for M2 Competition, claimed the drivers' championship title in the final race of the season.