Sigtryggsson is a surname. Notable people with the surname include:
Ánláf Sigtryggsson, 10th-century Norse-Gael who was King of Northumbria and Dublin Guðrøðr Sigtryggsson (died 951), King of Dublin Harald Sigtryggsson (died 940), Viking leader who ruled Limerick Olaf Sigtryggsson, son of Sigtrygg Silkbeard, the Hiberno-Norse King of Dublin Ragnar Sigtryggsson (1925–2009), Icelandic footballer Rúnar Sigtryggsson (born 1972), Icelandic Olympic handball player