Ragnvald Sigurdsson (c. 750 – after 814) was a semi-legendary lord of Huseby, in Lista (modern Norway).
He is best known for the marriage of his daughter, Gunnhild Ragnvaldsdatter, to Harald Granraude, king of Agder.
Ragnvald is not mentioned in accounts of events after 814, when Harald Granraude was killed by Gudrød the Hunter.
Haraldr Hárfagri ("Harald Fair-hair"; c. 850 – c. 932), who has usually been regarded as the first King of Norway, was a great-great-grandson of Ragnvald Sigurdsson, a great-grandson of Harald Granraude and a grandson of Gudrød the Hunter.
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