The 2003 Spanish Formula Three Championship was the third Spanish Formula Three season.
It began on 27 April at Albacete and ended on 9 November at Circuit de Catalunya in Montmeló after thirteen races.
[1] Ricardo Mauricio was crowned series champion.
[2] Bold – PoleItalics – Fastest Lap † – Drivers did not finish the race, but were classified as they completed over 90% of the race distance.