Hellvi is a populated area, a socken (not to be confused with parish), on the Swedish island of Gotland.

[9][10] Hellvi has seven nature reserves: Lörgeudd, Malms-Kyllaj, St Olofsholm, Sajgs, Ytterholmen, Storholmen and Träskvidar.

[14] On St Olofsholm peninsula is the ruin of the medieval Saint Olaf Chapel.

[15][16] In the 1980s, a ceremonial bronze mask made for the Roman cavalry, was found in Hellvi with the use of a metal detector.

It was kept in the finder's home until that person died, a friend inherited the mask and turned it over to the Gotland County Administrative Board in the winter of 2010.