Many of the laws that are the basis for what we consider immigration law today can be found in Title 8 of the United States Code (U.S. Code). Free digital copies of the U.S. Code can be found on several websites, including:

In addition, the Law Library Reading Room has annotated versions of the U.S. Code—the United States Code Annotated and the United States Code Service—that can help lead researchers to regulations, cases, and journal articles, among other sources, regarding their topics.

Similarly, many of the regulations that affect immigration law can be found in Title 8 of the Code of Federal Regulations (CFR). Free digital copies of the CFR can also be found online, at: