Tómasson is a surname of Icelandic origin, meaning son of Tómas. In Icelandic names, the name is not strictly a surname, but a patronymic. The name refers to:

• Haukur Tómasson (b. 1960), Icelandic composer
• Helgi Tómasson (1896–1958), Icelandic physician and psychiatrist
• Helgi Tómasson (dancer) (b. 1942), Iceland-born ballet dancer and artistic director of the San Francisco Ballet company (California, USA)
• Jon Dahl Tomasson (b. 1976), Danish former football player and manager
• [https://medicine.uiowa.edu/internalmedicine/profile/michael-tomasson Michael Tomasson] (b. 1963), American physician scientist and expert in hematologic malignancy

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