William LeBaron Jenney | |
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| Born | September 25, 1832 Fairhaven, Massachusetts, U.S. |
| Died | June 15, 1907 (aged 74) Los Angeles, California, U.S. |
| Nationality | American |
| Alma mater | École Centrale Paris |
| Occupation | Architect |
| Buildings | Home Insurance Building in Chicago |
| Design | metal-framed skyscraper |
William Le Baron Jenney (September 25, 1832 – June 14, 1907) was an American architect and engineer known for building the first skyscraper in 1884.
In 1998, Jenney was ranked number 89 in the book 1,000 Years, 1,000 People: Ranking the Men and Women Who Shaped the Millennium.