General

U.S. Commission on Civil Rights (USCCR)
Civil Rights Directory: State and Local Agencies (U.S. Commission on Civil Rights)
Civil Rights Division (U.S. Dept. of Justice)
The Civil Rights Project (Harvard University)

Civil Rights Crimes / Law Enforcement

Criminal Section (U.S. Dept. of Justice)
Misconduct of Law Enforcement Agencies (U.S. Dept. of Justice)
FBI Investigative Programs: Civil Rights (Federal Bureau of Investigation)

Disabilities

Americans with Disabilities Act (ADA) Home Page (U.S. Dept. of Justice)
Guide to Disability Rights Laws (U.S. Dept. of Justice)
Disability Resources (National Council on Disability)
Disability Rights Section (U.S. Dept. of Justice)

Education

Office for Civil Rights (U.S. Dept. of Education)
Educational Opportunities Section (U.S. Dept. of Justice)

Employment

Civil Rights Center (U.S. Department of Labor)
U.S. Equal Employment Opportunity Commission (EEOC)

Health Care

Office for Civil Rights (U.S. Dept. of Health and Human Services)

Housing

Fair Housing and Equal Opportunity (U.S. Department of Housing and Urban Development)
Housing and Civil Enforcement Section (U.S. Dept. of Justice)

Immigrants / National Origin

Office of Special Counsel for Immigration-Related Employment Practices (U.S. Dept. of Justice)
Initiative to Combat Post-9/11 Discriminatory Backlash (U.S. Dept. of Justice)
Trafficking in Persons (U.S. Dept. of Justice)

Sex / Gender Discrimination

Convention on the Elimination of All Forms of Discrimination Against Women (U.N. General Assembly)

Voting

Voting Section (U.S. Dept. of Justice)