Who was the first and who was the latest American F1 driver to win a grand prix?

Question

Which team, circuit, and season?

Answer 1

If you count the Indy 500s, first was Jhonnie Parsons in a Kurtis Kraft at Indianapolis on the 30th may 1950.

First American to win a non Indy race ( I think) was Phill Hill driving a Ferrari 156 at the Belgian gp ( Spa) on 18th june 1961.

Last was Mario Andretti driving a lotus 79 at Zandvoort (Dutch gp) on 27th august 1978.