Countries That Start With O
One country starts with O: Oman, a UN member state on the southeastern coast of the Arabian Peninsula. Its flag is shown below.
| # | Flag | Country | Capital | Population |
|---|---|---|---|---|
| 1 |  | Oman | Muscat | 4,829,480 |
Flags of countries starting with O
Oman, the only country that starts with O
Oman sits on the Arabian Sea and the Gulf of Oman, bordering the United Arab Emirates, Saudi Arabia and Yemen. Its capital is Muscat.
The flag has three horizontal stripes of white, red and green, with a wide red vertical band on the hoist side. The national emblem at the top of the red band shows a khanjar, a traditional curved dagger, over two crossed swords.
No territory or dependency starts with O, so Oman is alone on this page. If you were looking for a country starting with a nearby letter, try the lists for N and P.
Fun fact: Oman is the only country in the world whose name starts with O, which makes it one of the rarest first letters.