The Immigration Act of 1907 was a piece of federal United States immigration legislation passed by the 59th Congress and signed into law by President Theodore Roosevelt on February 20, 1907. The Act was part of a series of reforms aimed at restricting the increasing number and groups of immigrants coming into the U.S. before World War I. The law introduced and reformed a number of restrictions on immigrants who could be admitted into the United States, most notably ones regarding disability and disease.