4. The Arab Republic of Egypt
Population: 91.51 million
Although Abdul Fattah el-Sisi, a retired field marshal and current President of Egypt came to power via democratic elections in 2014 that were lauded by the international community, his approach to governance greatly changed when in power, and his government became increasingly authoritarian as his regime progressed, which is what earns Egypt a spot on our list of the 10 biggest countries ruled by dictators. One example of this can be the fact that thousands of protestors have been jailed and hundreds killed, as this BBC article from late last year shows.