According to the official data, a total of 1,259 South Korean nationals were incarcerated in 42 different countries as of June 30. It was slightly smaller than 1,336 people reported a year earlier.
The figure also includes those detained while awaiting trial from offenses they have committed.
Drug-related crimes were the single biggest reason for people being locked up with 315 people in prison for this offense alone.
Murder and fraud came next with 177 and 156 people imprisoned for these crimes, respectively, the data showed. (Yonhap)