As of 5:30 pm, 439,022 people cast their ballots, up from 375,669 in 2008.
The lines outside the polling place in downtown Little Rock extended out the doors to around the corner. One voter said it took half an hour to move halfway closer to the front door, but still she was far away from even the front steps.
For some Arkansas voters, this election is the tipping point for the country.
"That's why I'm here," said Debbis Haning. "I think there are many people that feel that the results of this election will set forth a pathway for the United States," he said.
The lines outside the polling place did not wane until about 5:45 pm.
The polls on Tuesday will open at 7:30 in the morning and will close at 7:30 pm.