The 2004 Spanish Formula Three Championship was the fourth Spanish Formula Three season. It began on 25 April at Albacete and ended on 14 November at Circuit de Catalunya in Montmeló after fourteen races.Borja García was crowned series champion.
† From the second round, CLM Motorsport retired and were purchased by Meycom Sport.
Bold – Pole
Italics – Fastest Lap
† — Drivers did not finish the race, but were classified as they completed over 90% of the race distance.