A few facts about San Ildefonso
- San Ildefonso has a population of about 5,400.
- It's part of Castille and León.
- Madrid, the largest city in Spain, is about 60 km away.
- The nearest bigger city is Segovia, about 11 km away.
- Towns nearby: Guadarrama (26 km), Collado-Villalba (30 km) and Colmenar Viejo (34 km).