2023 Formula Pro USA Western Championship

The 2023 Formula Pro USA Western Series was the fourth season of the championship for Formula Regional and Formula 4 cars established in the West Coast of the United States. The championship was promoted and organized by Exclusive Racing and Exclusive Auctions, and ran under the same sporting regulations as the FIA-sanctioned Formula Regional Americas Championship and Formula 4 United States Championship.

Formula Pro USA 3 (FPUSA-3)
All drivers competed with Honda-powered Ligier JS-F3 cars on Avon tires.

Formula Pro USA 4 (FPUSA-4)
All drivers competed with Honda-powered Ligier JS-F4 cars on Avon tires.

Race calendar
The 2023 calendar was planned to be held over twelve races spanning across six weekends. Compared to 2022, Buttonwillow Raceway Park joined the schedule, replacing one of the three rounds at Thunderhill Raceway Park. The weekend at Laguna Seca was cancelled mid-weekend due to issues with the newly-resurfaced track, meaning only ten races were held.

Championship standings
Points were awarded as follows: