This report separates Puerto Ricans into four major subgroups: those who were born on the mainland and live either in New York City, or elsewhere in the United States, and those who were born in Puerto Rico and live either in New York City, or elsewhere in the United States. The report places considerable emphasis on those born on the mainland. A section on overall observations describes the situation on the mainland and presents the diversity characterizing the four subgroups. Sections on demographic, social, economic, and housing conditions, and on the New York City area include topics such as migration, vital statistics, education, employment, income, family and marital status, quality of housing, and geographic distribution of the group in the New York City area. A final section on future migration from the island suggests that the Puerto Rican migrant of the future will resemble the general United States population more closely than did the earlier migrants, in terms of increased schooling, better jobs, higher earning, lower fertility rates, and an urban rather than rural background. (AM)