This report presents preliminary estimates, prepared using demographic analysis, of total legal resident population, age, sex, and race as of April 1980, the census date. The report then compares these values with corresponding census counts.
Data provided contrast error rates by age for each sex-race group for 1970 and 1980, compare the four race-sex groups for each census, and compare sex ratios (males per 100 females) in the estimated population with those from the census for 1970 and 1980. These figures exclude the impact of illegal aliens, but one table illustrates their possible effect on the undercount.
Census statistics date back to 1790 and reflect the growth and change of the United States. Past census reports contain some terms that today’s readers may consider obsolete and inappropriate. As part of our goal to be open and transparent with the public, we are improving access to all Census Bureau original publications and statistics, which serve as a guide to the nation's history.