The Comparable Wage Index (CWI) is a measure of the systematic, regional variations in the salaries of college graduates who are not educators. It can be used by researchers to adjust district-level finance data at different levels in order to make better comparisons across geographic areas. This documentation describes four geographic levels of the CWI, which are presented in four separate files. These files are the school district, labor market, state, and a combined regional and national file. For this study, 800 labor markets in the U.S. were identified. Except in Hawaii, each labor market includes one or more public school districts. Hawaii has a single, state-wide school district which includes three separate labor markets, so the state-level index was used for this district. The following are appended: (1) Record Layout and Descriptions of Data Elements: NCES District CWI Data File; (2) Record Layout and Descriptions of Data Elements: NCES Labor Market CWI Data File; (3) Record Layout and Descriptions of Data Elements: NCES State CWI Data File; (4) Record Layout and Descriptions of Data Elements: NCES Regional CWI Data File; (5) Glossary; (6) Variable Frequencies; and (7) Places of work names and constituent counties.