Answer :
The Democratic Republic of Congo has the highest population with 67.51 million people in 2013.
Angola has a population of 21 million people. Sierra Leone has a population of 6 million people. Democratic Republic of the Congo has a population of 68 million people. Cote d’Ivoire has a population of 20 million people. Therefore, Democratic Republic of the Congo has the highest population of the following African countries.