All precincts in York County were open and running smoothly by 7 a.m., said Steve Rast chairman of the county's Registrations and Elections Commission.
"We didn't really have any problems," he said. "There were a few machine issues -- less than 1 percent, I'd say."
Officials in Chester County also reported no problems at the polls this morning.
Heavy voter turnout is leading to long lines across Lancaster County, said Rick Crimminger, chairman of elections committee.
Sign Up and Save
Get six months of free digital access to The State
"Everything's open and operational," Crimminger said. "We have people lined up at almost all of the polls. It's heavy turnout for a midterm election."
He said there were a few problems with the audio voting machines, but those were resolved quickly.
What voters are saying:
John Johnson said he came to vote because "it's the right thing to do." He said governor and U.S. House of Representatives races interested him.
"I voted for Nikki Haley," he said. "I think she's the right woman for the job."
Eric Johnson said he also voted for Haley and Republican Mick Mulvaney for Congress.
"John Spratt had enough time," he said. "We need a change. ... It's a free country, let's keep it that way."
Victor Wilson said keeping Democrats in office in Congress motivated him to vote.
"I want to keep the country going in the proper direction," he said. "I voted for Spratt. I like the way he supports the President and what Spratt has been doing in office."
Elizabeth Washington said she came to vote this morning because "it's what you do." She said she's been voting in every election since she was 21.
"We need change down here," Washington said.
Voting for governor and U.S. House District 5 topped Washington and Mary McCullough's lists. Both said they voted for Democrats Vincent Sheheen and Spratt.
Rock Hill resident Robert White said getting rid of people from office drove him to the polls. He said wanted to vote against Spratt because he disagreed with his support of the health care bill.