The 2005 Spanish Formula Three Championship was the fifth Spanish Formula Three season. It began on 17 April at Circuito del Jarama in Madrid and ended on 13 November at Circuit de Catalunya in Montmeló after fifteen races.Andy Soucek was crowned series champion.
Bold – Pole
Italics – Fastest Lap
† — Drivers did not finish the race, but were classified as they completed over 90% of the race distance.