The 1975 ATP Nations Cup, sponsored by Reynolds Metals, was a men's team tennis tournament played on outdoor clay courts. It was the inaugural edition of the World Team Cup and took place in Kingston, Jamaica from 29 September through 5 October 1975. The tournament was played by the eight nations whose players were the highest ranked on the ATP ranking. Each team consisted of two or three players and the prize money for the event was $100,000. The United States defeated Great Britain in the final to win the title an $35,000 first prize money.