The United States and Tonga enjoy close cooperation on a range of international issues. Officers of the American Embassy in Suva, Fiji, are concurrently accredited to Tonga and make periodic visits since the United States has no permanent consular or diplomatic offices in Tonga. Peace Corps Volunteers teach and provide technical assistance to Tongans. Tonga has no embassy in Washington, DC, but has a permanent representative to the United Nations in New York who also is accredited as ambassador to the United States. A large number of Tongans reside in the United States, particularly in Utah, California, and Hawaii.

There is little trade between the United States and Tonga. In 2001 U.S. exports to Tonga totaled $4.8 million while U.S. imports from Tonga totaled $7.7 million.

The U.S. Embassy in Suva, Fiji is located at 31 Loftus Street (P.O. Box 218), Suva (tel. (679) 331-4466, fax (679) 330-2267).