The Red Sea Nation is a term used to refer to the countries that border the Red Sea. These countries include Eritrea, Sudan, and Yemen. Eritrea is a country located in the Horn of Africa with a population of around 5 million people. Sudan is a country located in North-Eastern Africa with a population of around 40 million people. Yemen is a country located in the Arabian Peninsula with a population of around 28 million people. All three countries are considered part of the Red Sea Nation.