Agencies under the Department of Homeland Security

• Customs & Border Protection (CBP)
  Operates the border patrol and customs at ports of entry such as airports and seaports.
• U.S. Citizenship & Immigration Services (USCIS)
  Processes applications for permanent residency and naturalization.
• Immigration & Customs Enforcement (ICE)
  Immigration enforcement agency that deports and detains non-citizens. 

Agencies under the Department of Justice

• Executive Office of Immigration Review (EOIR)
  Administrative court for immigrants.
• Immigration Courts
  Nationwide listing of immigration court locations and judges.
• EOIR Legal Orientation and Pro Bono Program
• Board of Immigration Appeals (BIA) 

Agencies under the U.S. Department of Health and Human Services

• Office of Refugee Resettlement (ORR)
  Assists refugees in obtaining economic and social self-sufficiency in the United States.
• ORR Unaccompanied Immigrant Minors Program
  Responsible for the housing of unaccompanied immigrant minors.
• Division of Immigration Health Services (DIHS)
  Responsible for providing health care to immigrants who are detained by Immigration and Customs Enforcement.

U.S. Senate

• Senate Judiciary Committee
  Responsible for Senate legislation dealing with U.S. immigration law.
• Senate Vote Information

U.S. House of Representatives

• House Judiciary Committee
  Responsible for House legislation dealing with U.S. immigration law.
• House Vote Information