South Carolina Department of Public Safety officials said there were 10 road deaths reported between July 22 and July 22.
Officials said nine of the deaths occurred on U.S. routes, S.C. roads and secondary roads and another occurred on an interstate.
In five of the deaths, officials said a seat belt was not used. Three who were killed used seat belts.
A pedestrian and an unhelmeted motorcyclist made up the other two deaths.
As of Monday, 513 people have died on state highways, compared to 534 highway deaths during the same time period in 2015. Of the 337 motor-vehicle occupants who have died in 2016, 169 were not wearing seat belts.
Sixty-nine pedestrians have been killed compared to 62 during the same time period in 2015. Seventy-four motorcyclists have been killed compared to 83 this time in 2015. Eleven bicyclists have died in 2016 compared to nine this time last year.