[Yemen](https://en.wikipedia.org/wiki/Yemen) is a country in Western Asia, on the southern end of the Arabian Peninsula. It borders Saudi Arabia to the north and Oman to the northeast and shares maritime borders with Eritrea, Djibouti, and Somalia. It is the second-largest Arab sovereign state in the peninsula, occupying 555,000 square kilometres (214,000 square miles). The coastline stretches for about 2,000 kilometres (1,200 miles). Yemen's constitutionally stated capital, and largest city, is the city of Sana’a. As of 2021, the population of the country is estimated at 30,491,000.