Ragnvald or Rognvald is an Old Norse language name (in Old English Rægnald and in Old Irish, Middle Irish Ragnall). It may refer to:
- Ragnvald the Mountain-High, legendary king of Vestfold
- Rognvald Eysteinsson (fl. late 9th century), Jarl of Møre
- Ragnall ua Ímair (died 921), King of York
- Ragnall mac Gofraid (died c. 944), co-King of York
- Raghnall mac Gofraidh (died 1229), King of the Isles
- Rogvolod (mid-10th century), Prince of Polotsk
- Ragnvald Ingvarsson (10th century), officer of the Varangian Guard
- Ragnvald Ulfsson the Old, jarl of Vastergotland and possibly father of King Stenkil of Sweden
- Rognvald Brusason (died c. 1046), Jarl of Orkney
- Ragnvald Ingesson (late 11th century), only known son and heir of King Inge I of Sweden
- Rögnvald Kali Kolsson (12th century), Norwegian saint and jarl of part of Orkney
- Ragnall mac Somairle (12th century), Hebridean magnate
- Ragnald III of the Isle of Man (ruled 1164)
- Ragnald IV of the Isle of Man (died 1229)
- Ragnald V of the Isle of Man (ruled 1248–1250)
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