The 2023 Formula Pro USA Winter Series was the third season of the winter series for Formula Regional and Formula 4 cars held as counterpart to the Formula Pro USA Western Championships. As is the main series, the winter championship is promoted and organized by Exclusive Racing and Exclusive Auctions. The championship was run under the same sporting regulations as the FIA-sanctioned Formula Regional Americas Championship and Formula 4 United States Championship.
All drivers competed with Honda-powered Ligier JS-F3 cars on Avon tires.
All drivers competed with Honda-powered Ligier JS-F4 cars on Avon tires.
The 2023 winter series calendar consisted of two rounds with two races each. Compared to 2022, Auto Club Speedway did not return to the schedule, with Thunderhill Raceway Park replacing it.
Points were awarded as follows: