The runoff cost taxpayers about $60,000 to staff the county's 50 polling places, Elections Director Lynn Bailey said. All precincts statewide are required to be open for statewide races.
In Columbia County, where turnout was only slightly higher, at 4.19 percent, the election cost county taxpayers about $12 per ballot to conduct Tuesday's $38,000 runoff, according to information from the elections office.
Voters in Columbia County cast 3,065 ballots in the runoff to help decide the state Supreme Court and Court of Appeals judgeships. There were no local runoffs.
The Richmond County school board runoff, which gave incumbent Eloise Curtis a fourth four-year term, saw slightly higher turnout at District 2's nine precincts, with 4.5 percent of the district's voters casting ballots.
In the Supreme Court race, statewide winner David Nahmias won a majority in both Richmond and Columbia counties, while statewide Court of Appeals winner Chris McFadden did not.
Statewide turnout for the runoffs was 4.54 percent.