HIstorically it's been a European dominated sport. However there is an American team next year:
http://www.formula1.c...ines/2009/2/8955.html
there's also been a host of US drivers over the years, some examples here:
http://www.f1fanatic....-american-f1-drivers/
In the US though, they're well served by motor sports: see NASCAR; Indycar; and Champcars ; these are predominatally US teams and drivers but like F1 in reverse there have been some notable European drivers. Sebastian Bourdais was Champcar champion for several years, for example.