Family name Sigfússon (Sigfússon 
) , throughout the world, is a rare cognomen. The family name Sigfússon is habitual in Northern Europe, particularly Iceland, where it is quite a common surname.
| sæmundur fróði sigfússon Icelandic writer, IS (b. 1056) |
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| egill sigfússon (b. 1650) |
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| sigfús sigfússon (b. 1855) |
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steingrímur jóhann sigfússon Icelandic politician, IS (b. 1955) |
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árni sigfússon Icelandic politician, IS (b. 1956) |
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| björn sigfússon (b. 1905) |
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pétur jóhann sigfússon actor, comedian, radio host and screenwriter, IS (b. 1972) |
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| hannes sigfússon Icelandic poet (1922-1997), IS (b. 1922) |
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| þorsteinn ingi sigfússon Icelandic physicist (1954-2019), IS (b. 1954) |
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| gylfi sigfússon (b. 1961) |
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