The principal results of the 1980 United States Census regarding Cuban Americans are summarized and analyzed in this report. The presentation is divided into the following sections: (1) residence and geographic distribution; (2) age and sex composition; (3) fertility; (4) family structure and marital status; (5) educational characteristics; (6) labor force participation and employment; (7) class of worker, industry and occupation; and (8) income. Major findings of this data set, which is said to be unprecedented in its comprehensiveness and detail, are the following: the Cuban population surpasses the total United States population, as well as every other major Hispanic group, in the proportion that resides in metropolitan (mostly suburban) areas. In comparison with the other Hispanic populations, as well as with the total United States population, the Cubans are not only the oldest group (median age: 37.7 years), but also the group with the highest proportion of females. The Cuban rate of reproduction is relatively low, especially in comparison with other Spanish-origin groups. Cubans have the lowest proportion of families with children, but also a relatively low proportion of never-married persons. The number of school years completed by the Cuban-origin population was 12.2, slightly below the corresponding figures for other groups (except Mexicans and Puerto Ricans). The proportion of all Cubans over 16 in the labor force is higher than the corresponding figure for all other groups. Cubans are least likely to be employed in the public sector, and exhibit a higher proportion of self-employed persons in comparison with other Hispanic groups. The cuban median family income is closer to the figure for all families in the United States than that of other Hispanic groups. (KH)