The 2023 F4 Brazilian Championship was the second season of the F4 Brazilian Championship. It was a multi-event motor racing championship for open wheel, formula racing cars regulated according to FIA Formula 4 regulations. The championship used Tatuus F4-T421 chassis.

All pre-selected teams were Brazilian-registered. Unlike the previous year, there was no draw allocating the drivers to the teams.

Full Time Sports' Formula 4 operation were moved under its subsidiary Bassani Racing. KTF Sports was not replaced.

The schedule was revealed on 1 February 2023. All rounds were held in Brazil and all but one supported the 2023 Stock Car Pro Series events. One round supported the 2023 São Paulo Grand Prix. In April 2023, the round at Autódromo Internacional Nelson Piquet in Brasília on 16–18 June was replaced by the round at Interlagos Circuit three weeks later. Likewise in September 2023, the round at Autódromo Internacional Nelson Piquet on 24–26 November was replaced by the round at Interlagos Circuit three weeks later.

Points were awarded to the top ten classified finishers in 25-minute races and for the top eight classified finishers in 18-minute races. The final individual classifications were obtained by dropping two worst results from the first five rounds of the championship.

Each team acquired the points earned by their two best drivers in each race.