The 19-year-old was the strong favourite after playing every game in his debut season.
O'Meara polled 44 votes, with Adelaide's Brad Crouch next on 31 and Port Adelaide onballer Oliver Wines third on 26.
O'Meara polled the maximum five votes from eight of the nine judges.
He polled four votes from former Adelaide captain Mark Ricciuto, who gave the five to Crouch.
O'Meara was one of only two Suns to play every game this season.
The WA native earnt his nomination in round five when he had 25 disposals against Greater Western Sydney.
O'Meara had an outstanding debut season, averaging 22 possessions and 10 contested possessions per match.
He had the most disposals, most contested possessions, most clearances and most tackles of the 23 Rising Star nominees.
His 111 tackles also led Gold Coast this season and was 16th in the AFL.