The 2025 Formula Regional Americas Championship was the eighth season of a FIA-sanctioned F3/FR-level series across North America, and the sixth season under the Formula Regional moniker after a rebrand in 2020. The series was promoted by SCCA Pro Racing, the professional racing division of the Sports Car Club of America.

Crosslink Motorsports driver Titus Sherlock won the Drivers' Championship title at the penultimate race of the season, while the team of his closest competitors, Kiwi Motorsports, defended their Teams' Championship title for the third year in a row, after winning it in conjunction with Crosslink Motorsports in 2023 and 2024, with four races to spare. Kiwi Motorsports' Bruno Ribeiro, third overall, won the Rookie title, while Momentum Motorsports' Anthony Autiello was awarded the Masters' title.

All drivers competed with Ligier JS F3 cars on Hankook tires powered by mountune MK20R engine power units based on the Honda K20C1 engine.

The 2025 calendar was announced on 27 September 2024. The championship returned to Virginia International Raceway and Barber Motorsports Park after one- and four-year absences respectively. The non-championship round at Laguna Seca was not held, as was the round at Circuit of the Americas. The rounds at Mid-Ohio, VIR and Barber Motorsports Park were scheduled to hold only two races, forming a 21-race calendar. The first race at Indianapolis was not held due to adverse weather conditions, with a third race at Mid-Ohio added to keep the 21-race tally.

The 2025 Formula Regional Americas Championship began at NOLA Motorsports Park. Kiwi Motorsport locked out the front row in qualifying, with Nicolás Ambiado on pole position ahead of Bruno Ribeiro. Wet conditions defined race one, where a mix of tyre choices and a cautious start led to early chaos. Toney Driver Development's Brady Golan had started on slicks to take the lead initially, but Crosslink's Titus Sherlock charged through on wet tires to take control. Two safety-car periods saw half points awarded for limited green running, and Sherlock secured victory ahead of Ambiado and Crosslink's Barrett Wolfe. Race two also began in damp conditions. Ambiado led until Sherlock again surged to the front before suffering an engine failure. Golan inherited the lead and held off Ambiado to take his first win. In the dry race three, Kiwi Motorsport's Jett Bowling converted pole position into an early advantage, but Ambiado passed Ribeiro and capitalized on a late mistake from Bowling to claim victory and the points lead ahead of Golan and Ribeiro.

Road America hosted round two, where Bowling was fastest in qualifying but caused a red flag, so he lost his best lap and Sherlock inherited pole position. Race one began on slicks before heavy rain forced a mid-race switch to wets and a long caution period. Sherlock led throughout the disrupted race, finishing ahead of Ribeiro and Atlantic/Team Roberts' Connor Roberts as only five laps were completed and half points were awarded. In race two, Ribeiro overtook Sherlock at the start, but Sherlock reclaimed the lead on lap two and stayed ahead until a caution-neutralized finish after incidents involving Toney Driver Development's Lincoln Day and Kiwi Motorsports' Kevin Janzen. Bowling started race three from pole position, before he went off at the restart after an early caution, which promoted Sherlock to the front. Further interruptions followed, and when Ribeiro and Ambiado collided battling for third, Golan inherited the final podium spot. Sherlock’s clean sweep put him atop the standings with 87 points, with Ambiado now second.

Golan took pole position at Indianapolis Motor Speedway with a margin of 0.183 seconds over Bowling, while Ambiado qualified third and points leader Sherlock fourth. Persistent rain forced the cancellation of practice and postponed the opening race to Sunday, with the third race rescheduled to Mid-Ohio. In the first race, Bowling seized the lead around the outside of turn one, while Golan ran wide and Sherlock retired early with a mechanical issue. Ambiado inherited second before a caution for an off-track moment for Wolfe bunched up the field. Bowling held firm after the restart to secure his maiden victory, as Ribeiro and Kiwi Motorsport's Nicolas Stati passed Ambiado late when he locked up on lap 17. Ambiado nevertheless earned race two pole position with the fastest lap. He lost out to Bowling at the start but reclaimed the lead with a move around the outside of turn one on lap five and pulled clear to win. Sherlock recovered to fourth, but still had to relinquish the championship lead to Ambiado, who left Indianapolis 6 points ahead of the field.

The first half of the season closed off at Mid-Ohio Sports Car Course, where Ribeiro claimed pole position ahead of Ambiado and Golan. Race one was controlled from start to finish by Ribeiro, who built a lead of 1.6 seconds before Ambiado closed back in on the final lap to finish 0.2s behind as Sherlock passed Golan for third. Ribeiro’s fastest lap earned him race two pole position, but Ambiado led early before a caution came out for Hayden Bowlsbey’s stranded Crosslink Motorsport car. After the restart, the top two fought for the lead, making contact on lap 15, with Ambiado narrowly prevailing. Sherlock in third came under pressure from Bowling, who got past him on the penultimate lap. Ribeiro started race three from pole position, but lost the lead at the start before repassing Ambiado on lap 12. Ambiado later dropped to third behind Bowling after a mistake. Ribeiro's double win saw him claim a three-point championship lead over Ambiado, with Sherlock retired from race three and dropped to fourth in the standings.