The Florida primary may already be over.

Tampa, Florida (CNN) - It’s primary day in the Sunshine State, but more than 600,000 people have already voted in Florida’s Republican presidential contest. And a new public opinion poll indicates that the ballots already cast may help former Massachusetts Gov. Mitt Romney take the 50 delegates up for grabs in Florida’s winner take all primary.

Early voting began statewide ten days ago, and according to figures released Monday afternoon by the Florida Department of State, which runs the division of elections, 293,760 people had already cast ballots. And according to the state, more than 531,000 people requested and were sent absentee ballots, and 338,753 were returned and received by Florida officials.

Add it all together and more than 632,000 votes were already cast before primary day. To put it in perspective, that’s more than the 601,577 who voted in the South Carolina primary, and far outpaces the combined 360,000 that took part in the New Hampshire primary and the Iowa caucuses.

And according to an American Research Group survey released Tuesday morning, 36% of people questioned said they already voted, and among those, Romney led former House Speaker Newt Gingrich 51% to 29%, with former Sen. Rick Santorum of Pennsylvania at 12% and Rep. Ron Paul of Texas at 10%.