The 2026 Formula Pro USA Western Series is the seventh season of the championship for Formula Regional and Formula 4 cars established on the West Coast of the United States. The championship is promoted and organized by Exclusive Racing and Exclusive Auctions, and is run under the same sporting regulations as the FIA-sanctioned Formula Regional Americas Championship and Formula 4 United States Championship.
It began in March, with the championship spanning six weekends until November.
Drivers are able to enter either the FPUSA-3 or the FPUSA-4 class, with the former using a Ligier JS F3 car and the latter a Ligier JS-F4 car. All cars are powered by Honda and use Avon tires.
The 2026 calendar will once again be held over twelve races spanning across six weekends. The series did not return to Buttonwillow Raceway Park, instead replacing it by a third round at Sonoma Raceway.
The 2026 season of the Formula Pro USA Western Championship began with two weekends at Sonoma Raceway. The first one saw two entrants in the FPUSA-3 class, with Dan Decker sweeping the weekend ahead of his World Speed Motorsports teammate Larry Schnur by claiming pole position, fastest lap and the win in both races. Eleven cars entered the FPUSA-4 class, but Kiwi Motorsport's Lucas Hand showed similar levels of dominance by also claiming maximum points. His teammate Will Franklin took second on the road in both races, but was later excluded, handing WSM's Erik Doan two second places. Yana Kapoor, also driving for WSM, beat her two opponents in FPUSA-WRS in both races.
Points are awarded as follows:
Each driver's two worst results will be dropped.