Westervelt is a surname. Notable people with the surname include:
- Franklin H. Westervelt, engineer, computer scientist, and educator at the University of Michigan and Wayne State University
- George Conrad Westervelt, co-founder of The Boeing Company
- Herbert E. Westervelt, founder of Gulf States Paper Company and inventor of the machine that made the foldable-paper bag, the E-Z Opener, a bag that could be opened with a flick of the wrist
- Jacob Aaron Westervelt, shipbuilder in the mid-19th century, and a mayor of New York City between 1853 and 1855
- Jacob Westervelt, High Sheriff of New York City and Assistant Alderman
- Peter Westervelt, physicist, and nephew of George Conrad Westervelt
- William Drake Westervelt, author of several books and magazines on Hawaiian history and legends
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