| Post: | Ambassador |
| Body: | the United States to the United Nations International Organizations in Vienna |
| Insignia: | US Department of State official seal.svg |
| Insigniasize: | 120px |
| Insigniacaption: | Seal of the United States Department of State |
| Department: | United States Department of State |
| Incumbent: | Laura Holgate |
| Incumbentsince: | February 1, 2022 |
| Nominator: | President of the United States |
| Inaugural: | Richard S. Williamson as Representative |
| Formation: | 1983 |
| Website: | U.S. Mission to the International Organizations in Vienna |
The United States ambassador to the United Nations International Organizations in Vienna is the diplomatic representative of the United States to those organizations of the United Nations Office in Vienna.
Organizations include: the International Atomic Energy Agency, the Comprehensive Nuclear-Test-Ban Treaty Organization, the United Nations Office for Outer Space Affairs and the United Nations Office on Drugs and Crime, among others. The position is formally split into two permanent representative-level positions, titled United States Permanent Representative to the Vienna Office of the United Nations and United States Permanent Representative to the International Atomic Energy Agency, each of which requires a separate Senate confirmation. Because the representative holds the rank of an ambassador, they are commonly referred to by this title.
References from the State Department, unless otherwise indicated.