Sigvaldi is an Icelandic masculine given name. Notable people with the name include:
- Sigvaldi Guðjónsson (born 1994), Icelandic handball player
- Sigvaldi Kaldalóns (1881–1946), Icelandic composer and physician
See also
edit- Sigvaldi Strut-Haraldsson, chieftain of the fabled Jomsvikings