Hewetson is a surname. Notable people with the surname include:
- Al Hewetson (1946–2004), Scottish-Canadian writer
- Christopher Hewetson, Irish sculptor
- Christopher Hewetson (priest), English priest
- Edward Hewetson, English cricketer
- James Hewetson, Texas empresario
- John Hewetson, British anarchist and physician
- Sir Reginald Hewetson, military general
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