This report presents estimates of the population for 1980 to 1986 for Puerto Rico, the American Virgin Islands, American Samoa, Guam, and the Northern Mariana Islands. Census counts for 1980 are also shown for each of the areas. Except for Puerto Rico, all of the areas are growing at a rate well above that of the United States (6.4 percent). Of all the areas, Guam has exhibited the most growth since 1980--19.6 percent. Although both Puerto Rico and the Virgin Islands have increased in population since 1980, both experienced population declines between 1985 and 1986: the Virgin Islands declined by 1.2 percent, Puerto Rico by 0.3 percent. The components of population decline are natural change (births minus deaths) and net migration (immigrants minus emigrants). Limitations of the estimates are discussed. Maps of the areas discussed are provided. Three tables illustrate the data. (BJV)