Moroni is the largest city, federal capital, and seat of the government of the Union of the Comoros, a sovereign archipelago nation in the Indian Ocean. Moroni means "at the river". Moroni is the capital of the semi-autonomous island of Ngazidja, the largest of the three main islands of the republic. The city's estimated population in 2003 was 41,557 residents. Moroni, which lies along the Route Nationale 1, has a port and several mosques such as the Badjanani Mosque.

The Comoros, officially the Union of the Comoros, is an archipelagic country made up of three islands in Southeastern Africa, located at the northern end of the Mozambique Channel in the Indian Ocean. Its capital and largest city is Moroni. The religion of the majority of the population, and the official state religion, is Sunni Islam. Comoros proclaimed its independence from France on 6 July 1975. A member of the Arab League, it is the only country in the Arab world which is entirely in the Southern Hemisphere. It is a member state of the African Union, the Organisation internationale de la Francophonie, the Organisation of Islamic Co-operation, and the Indian Ocean Commission. The country has three official languages: Shikomori, French and Arabic.