The Republic of Yemen or Yemen is a nation in the Middle East. It is the old North Yemen and South Yemen, in the south of the Arabian Peninsula. It borders Saudi Arabia and Oman on the north and the east. To the south is the Guardafui Channel and Gulf of Aden, and to the west is the Red Sea. Yemen owns the island of Socotra (217 miles) to the south off the coast of East Africa. A person or thing from Yemen is called "Yemeni". Yemen's capital city is Sana'a.