The monograph presents a set of social and economic indicators developed for each of the 118 counties in Arizona, California, Nevada, and Utah which comprise the joint Far West Lab/SWRL laboratory service regions. The objective of developing and mapping these indicators was to delineate major similarities and differences among these counties in terms of selected social and economic data. Factor analysis was performed on 35 data items selected from the U.S. Census 1967 "County and City Data Book." Eight categories resulted from this categorization: population size, population growth, population age, affluence, medical service, manufacturing employment, sales employment, and agriculture. Counties were then grouped together on the basis of similarities on these eight factors. Information is also presented in the form of narrative, statistics, maps, tables, and lists on location of major county groups, differences among major groups in terms of means on a number of social and economic measures, and grouping for the 58 counties in California and for the combined 60 counties in Arizona, Nevada, and Utah. Results from this statistical picture of the Far West Lab/SWRL Laboratory service regions can be grouped into three major sets. First, it has indicated how 35 county level social and economic measures are related and has produced eight statistically independent factor scores that can be employed in future studies as potential predictors of county educational and social characteristics. Second, it has demonstrated that there are both similarities and striking differences among the counties in the four states. Finally, it has provided some understanding of the general demographic and economic characteristics of each type of county on a statistically descriptive level. (DB)