List of American players who have won Gold medals in the Chess Olympiads (unless stated, it is team gold):
Men:
Kashdan (team and individual gold)
Marshall (team and individual gold)
Horowitz (team and individual gold)
Fine (team and individual gold)
Dake (team and individual gold)
Seirawan (individual gold)
Byrne
Evans
Lombardy
Kavalek
Tarjan
Commons
Reshevsky
Kupchik
Steiner
and Simonson
Women:
Polgar (team and individual gold)
Zatonskih (individual gold)
Please feel free to add or correct any of the facts.
http://www.olimpbase.org/teamsw/usa_i01.html
http://www.olimpbase.org/teams/usa_i00.html
Chess Daily News from Susan Polgar
No Fischer?