The Republic of Yemen commonly known as Yemen is a country located in the Middle East, occupying the southwestern to southern end of the Arabian Peninsula. It is bordered by Saudi Arabia to the north, the Red Sea to the west, and Oman to the east.
Yemen has a land area of 555,000 square kilometers and a population of approximately 24 million (2010). Its capital and largest city is Sana'a. Yemen's territory includes over 200 islands, the largest of which is Socotra, about 415 km to the south of mainland Yemen, off the coast of Somalia. It is the only state in the Arabian Peninsula to have a purely republican form of government.

(Source - en.wikipedia.org)