The International Organizations Immunities Act[1] (IOIA) is a United States federal law enacted in 1945.

It "established a special group of foreign or international organizations whose members could work in the U.S. and enjoy certain exemptions from US taxes and search and seizure laws".

The 79th United States Congress passed the IOIA on December 29, 1945; the Act can be found under Title 22, chapter 7, sub-chapter XVIII.

The IOIA was passed to strengthen the international organizations that the U.S. collaborates with, including those that are located in foreign countries.

The Senate Committee believed that passing this Act would allow international organizations to perform more effectively and accomplish their goals.

Since the time it was passed, the Department of State has been the agency that receives applications from organizations requesting designation under the Act.

[8] The Secretary of State was given the power to advise the President (who makes the final decisions) on matters like whether an organization should or should not be granted protection under the IOIA.

Subsequently, on May 14, 1994, the President signed and brought into force the Agreement on State and Local Taxation of Foreign Employees of Public International Organizations.

Conservative bloggers and people such as former Speaker Newt Gingrich did not support the President extending privileges, exemptions, and immunities to Interpol.

Conservative bloggers claimed that by increasing the privileges and immunities Interpol received, the President was allowing an international police to run amok without legal restraint.

[108] In 2019, the United States Supreme Court ruled that the IOIA did not grant international organizations absolute immunity.