Inauguration of Sergio Osmeña
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| Date | August 1, 1944 |
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| Location | Washington, D.C. United States |
| Participants | President of the Philippines, Sergio Osmeña Robert H. Jackson |
The Inauguration of Sergio Osmeña as the fourth President of the Philippines and the second president of the Philippine Commonwealth under the United States occurred on August 1, 1944 under extraordinary circumstances. The inauguration marked the commencement of the first term (which lasted one year nine months and twenty-nine days) of Sergio Osmeña as President, following the death of President Manuel L. Quezon.