Mae Unol Daleithiau America yn un o bartneriaid masnachu pwysicaf Cymru. Mae dros 250 o gwmnïau o Ogledd America yn gweithredu o leoliadau yng Nghymru. Mae'r rhain yn cynnwys GE Aviation, Ford a General Dynamics, ac mae llawer o fusnesau o Gymru'n buddsoddi a masnachu yng Ngogledd America.
The United States of America is one of Wales’ most important trading partners. There are over 250 North American companies based in Wales – including GE Aviation, Ford, and General Dynamics, with many Welsh companies also investing and doing business in North America.