The 2023 ROKiT F4 British Championship is a multi-event, Formula 4 open-wheel single seater motor racing championship held across United Kingdom. The championship features a mix of professional motor racing teams and privately funded drivers, competing in Formula 4 cars that conform to the technical regulations for the championship. This, the ninth season, following on from the British Formula Ford Championship, is the ninth year that the cars conform to the FIA's Formula 4 regulations. Part of the TOCA tour, it forms part of the extensive program of support categories built up around the BTCC centrepiece.
The season commenced on 22 April at Donington Park and concluded on 8 October at Brands Hatch, utilising the Grand Prix circuit, after thirty races to be held at ten meetings, all but one in the support of the 2023 British Touring Car Championship.