The 24-year-old scored three tries, including a double during the opening weekend victory against Ireland.
He continued to be his team's main attacking threat throughout the tournament, playing a key role as the Scots went on to secure wins over Wales and Italy.
Hogg secured 24 percent of the public vote with Ireland back-row forward CJ Stander in second place.
"To receive this award again is an absolute honour, particularly when you take other players on the shortlist into account," Hogg said.
(Reporting by Ben McIntosh, editing by Ed Osmond)
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