The fattest people are from which countries?

Libya - 30.8%

Across the Arab world women are disproportionately likely to be overweight or obese. Cultural norms discourage women’s mobility, physical or otherwise, and encourage lives of sedentary binge eating. In Libya, this leaves women double the obesity rate of men. Throwing fast food in the mix, and these gender customs may be the biggest reason for climbing obesity rates in North Africa.