County population estimates (provisional) by age, sex, and race

Included in this data collection are population estimates for each of the 3,145 counties and county equivalents in the United States as defined in the 1970 census, the estimates are for July 1st of 1980, 1981, and 1982. There are 18 age groups, the two race categories are white, and black and other races. The estimates were originally prepared for the National Cancer Institute (NCI), and are sometimes referred to as the ''NCI County Age, Sex, and Race Estimates.'' They are labeled ''provisional'' because they will eventually be replaced with estimates which rely on 1980 county migration data. The data are contained in one rectangular file.