Round 6 of the 1966 FIA Formula One World Championship returned to the Nürburgring for the XXVIII Großer Preis von Deutschland.
Round 5 of the 1966 FIA Formula One World Championship returned to the Circuit Zandvoort for the XIV Grote Prijs van Nederland.
Round 4 of the 1966 FIA Formula One World Championship returned to the Brands Hatch for the XIX RAC British Grand Prix.
Round 3 of the 1966 FIA Formula One World Championship returned to the Reims-Gueux for the 52e Grand Prix de l' ACF.
Round 2 of the 1966 FIA Formula One World Championship returned to the Circuit de Spa-Francorchamps for the XXVI Grand Prix de Belgique.
Round 1 of the 1966 FIA Formula One World Championship returned to the Circuit de Monaco for the XXIV Grand Prix Automobile de Monaco.
Round 10 of the 1965 FIA Formula One World Championship returned to the Autódromo Hermanos Rodríguez for the IV Gran Premio de Mexico.
Round 9 of the 1965 FIA Formula One World Championship returned to the Watkins Glen International for the VIII United States Grand Prix.
Round 8 of the 1965 FIA Formula One World Championship returned to the Autodromo Nazionale di Monza for the XXXVI Gran Premio d'Italia.
Round 7 of the 1965 FIA Formula One World Championship returned to the Nürburgring for the XXVII Großer Preis von Deutschland.