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| Date | March 4, 1841 |
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| Location | United States Capitol, Washington, D.C. |
| Participants | William Henry Harrison 9th president of the United States — Assuming office Roger B. Taney Chief Justice of the United States — Administering oath John Tyler 10th vice president of the United States — Assuming office William R. King President pro tempore of the United States Senate — Administering oath |
The inauguration of William Henry Harrison as the ninth president of the United States was held on Thursday, March 4, 1841, at the East Portico of the United States Capitol in Washington, D.C. This was the 14th inauguration and marked the commencement of the only four-year term of both William Henry Harrison as president and John Tyler as vice president. The presidential oath of office was administered to Harrison by Chief Justice Roger B. Taney.[1] Harrison died 31 days into his term, the first U.S. president to die in office and has the shortest presidential term in American history. Tyler then succeeded to the presidency, creating a precedent which would be followed seven more times before it was officially regulated through the Twenty-fifth Amendment in 1967.