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.
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"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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