The 1966 Federation Cup was the fourth edition of what is now known as the Fed Cup.

21 nations participated in the tournament, which was held at the Turin Press Sporting Club in Turin, Italy from 10 to 15 May.

United States won their second title, defeating West Germany in the final, in what was the first final not featuring Australia.

[1] All ties were played at the Turin Press Sporting Club in Turin, Italy on clay courts.

Sweden vs. Morocco Hungary vs. Belgium Bulgaria vs. Canada Rhodesia vs. Austria United States vs. Sweden France vs. Hungary Great Britain vs. Canada Czechoslovakia vs. Poland Italy vs. Rhodesia Argentina vs. West Germany Netherlands vs. South Africa Switzerland vs. Australia United States vs. France Great Britain vs. Czechoslovakia Italy vs. West Germany Netherlands vs. Australia United States vs. Great Britain West Germany v Australia United States vs. West Germany