The 2005 Formula BMW ADAC season was a multi-event motor racing championship for open wheel, formula racing cars held across Europe. The championship featured drivers competing in 1.2 litre Formula BMW single seat race cars. The 2005 season was the eighth Formula BMW ADAC season organized by BMW Motorsport and ADAC. The championship was contested over twenty races at ten meetings, one of them supporting the European Grand Prix.
Nico Hülkenberg was crowned series champion.