This report presents statistics from the 1970 Census of Population on general social and economic characteristics of the inhabitants of each of the 510 State economic areas into which the United States is divided. State economic areas (SEA's) are subdivisions of States, consisting of single counties or groups of counties that have similar social and economic characteristics. In general, the statistics for SEA's presented in this report represent a consolidation of selected tabulations published for counties and other areas in the PC(1)-C series of reports for the various States.

The text consists of an introduction and Appendices A through D, which appear after the tables.

Content of the Tables

• Tables 1-3 – general characteristics of the total population, Negro population, and persons of Spanish heritage
• Table 4 – social characteristics 
• Table 5 – educational and family characteristics
• Table 6 – employment and industrial characteristics
• Tables 7, 10-11, 13 – occupation and income
• Tables 8-9, 12 – social and industral characteristics of the Negro population and of persons of Spanish heritage

Appendices

• Appendix A. General Information Concerning the Data
  
• Appendix B. Definitions and Explanations of Subject Characteristics
  
• Appendix C. Accuracy of the Data
  
• Appendix D. Publication and Computer Summary Tape Program

Sample size. The statistics for 1970 presented in this report are based on a sample inflated to represent the total population (see "Ratio Estimation" in Appendix C). The data are derived from the 15-percent and 5-percent sample questionnaires as explained  in the section "Data Collection Procedures." Some items appeared on both sample questionnaires and, therefore, are based on a 20-percent sample of the population. Figures for a characteristic (e.g., the native population) may differ from table to table or within the same table when the figures are derived from different samples. (The sample rate for each subject is shown in table A of Appendix C, "Accuracy of the Data.")