South Korea. At least according to some survey mentioned in this Forbes.com article. This may make your job look better:
If you thought you worked long hours, consider 39-year-old Lee from South Korea. A civil servant at the ministry of agriculture and fisheries, Lee gets up at 5:30 a.m. every day, gets dressed and makes a two-hour commute into Seoul to start work at 8:30 a.m. After sitting at a computer for most of the day, Lee typically gets out the door at 9 p.m., or even later.
By the time he gets home, it’s just a matter of jumping in the shower and collapsing into bed, before starting the whole routine all over again, about four hours later. This happens six days a week, and throughout almost all of the year, as Lee gets just three days of vacation.
That’s right. Three days.