According to the U.S. Department of Housing and Urban Development (HUD), the mission of the Office of Fair Housing and Equal Opportunity (FHEO) is to eliminate housing discrimination, promote economic opportunity, and achieve diverse, inclusive communities by leading the nation in the enforcement, administration, development, and public understanding of federal fair housing policies and laws.
FHEO protects people from discrimination on the basis of race, color, religion, sex, national origin, disability, and familial status.  In addition, housing providers that receive HUD funding, have loans insured by the Federal Housing Administration (FHA), as well as lenders insured by FHA, may be subject to HUD program regulations intended to ensure equal access of LGBT persons.

U.S. Department of Housing and Urban Development
The Leadership Conference
National Fair Housing Advocate Online
U.S. Department of Justice
U.S. Department of Justice
Disabled Fair Housing
National Fair Housing Alliance