For an excellent one-volume source of information on employment discrimination, I recommend the Manual on Employment Discrimination and Civil Rights Actions, which includes the text of most of the important Federal statutes and appendixes outlining the laws of individual states. Other good sources are Termination of Employment by James Castagnera et. al., which summarizes the Federal and State laws (with extensive footnotes) and the State by State Guide to Human Resources Law, which summarizes state laws. Good multi-volume sources include EEOC Compliance Manual (available from BNA and CCH) and Larson's Employment Discrimination, which includes EEOC (and other) forms.
Federal employment discrimination laws are enforced by the Equal Employment Opportunity Commission. For more information about the EEOC and its publication's, see the Equal Employment Opportunity Commission entry in this Guide. The Laws Regulations and Policies section of the Web site posts the relevant laws and regulations plus sections of the EEOC Compliance Manual, Memoranda of Understanding and EEOC Enforcement Guidance.
You can link to Equal Employment-related laws, Congressional Research Service reports, Federal agencies, non-government web sites and recent Supreme Court opinions through the Federal Equal Employment Opportunity Laws, Cases, and Resources page of the LLSDC's Legislative Source Book.
The Labor and Employment module of Practical Law Company provides detailed summaries of the employment discrimination laws of each state.
Consent Decrees: The Cornell School of Industrial and Labor Relations (ILR) posts a database of consent decrees (i.e., settlement agreements) from Title VII race and sex discrimination class action lawsuits. If that isn't enough you can find more consent decrees using the tools to search case filings discussed in the Docket Sheets entry.
EEO Plan Data: In the U.S., Federal and state laws require employers to develop Equal Employment Opportunity (EEO) or affirmative action plans. The statistical data to support these plans is taken from the decennial census. Census data is available from the Census Bureau and the EEOC.
In addition, state equal employment agencies provides targeted data from the census. This information is posted on the Web for many states including California, Maryland, Nevada and New York.