- Youngest pilot and only spaniard to get a podium, a race and a world championship.
- His girlfriend, Raquel del Rosario, is the lead singer of "El sueño de Morfeo" rock band (Morpheus dream).
- Likes horror movies
- Rejected an offer to play goalkeeper for Vigo's Celta soccer team.
- Admires Lance Armstrong and rides bycicles
- Won his first race being 3 years old on a kart built by his father
- He got his racing pilot license by the "Federación Española de Automovilismo" being 4 years old.
- One family in Catalunya paid for his career, including the cost of entering F1, when Alonso's own family declared they couldn't afford the expenses any more. I believe it is Genís Marcó's family, a kart importer.
- He got third place in 1996 World Kart championship, ahead of Kimi Räikönnen. He was able to run on a scolarship paid by the "Federación Española".
- He rejected an offer from Toyota to run an F1 car in 1996
- He is called "Nano" at home (short for "Enano" or "Midget") and El Matador or El Toro by spanish press.
- When he got his driving license, being 18 years old and a "veteran" pilot, he made a mistake for driving too slow. He explained it saying that his family had been insisting on him "not to drive too fast during the test".
- The flag of Asturias, his home province, is blue with a yellow cross, and many people confuses it with the Renault colors when asturian fans carry it, because they are almost identical in tone.
- His helmet has the colors of the spanish and asturian flag. The yellow cross portrayed on the asturian flag and the helmet, with the letters alpha and omega, is called the "Victory cross".


Taken from spanish Wikipedia (except the Victory cross part), when I noticed that the english version doesn't give this information.