Senior US officials will travel to Nauru with Secretary of the Interior Ryan Zinke for the September 4 talks.
A Department of State spokesperson said they will discuss combating illegal fishing, responding to the threat of North Korea and promoting sustainable development.
In recent weeks Washington has announced funding totalling $US413 million into the Indo-Pacific region.
While the United States is not a member of the Pacific Islands Forum, it is one of several dialogue partners.
Photo by Loop Nauru