Nicosia ( NIK-ə-SEE-ə; Greek: Λευκωσία, romanized: Lefkosía [lefkoˈsi.a]; Turkish: Lefkoşa [lefˈkoʃa]; Armenian: Նիկոսիա, romanized: Nikosia; Cypriot Arabic: Nikusiya) is the largest city, capital, and seat of government of Cyprus. It is located near the centre of the Mesaoria plain, on the banks of the River Pedieos.

According to Greek mythology, Nicosia (Lefkosia in Greek) was a siren, one of the daughters of Acheloos and Melpomene and its name translates as "White State" or city of White Gods.

Nicosia is the southeasternmost of all EU member states' capitals. It has been continuously inhabited for over 4,500 years and has been the capital of Cyprus since the 10th century. The Greek Cypriot and Turkish Cypriot communities of Nicosia segregated into the south and north of the city respectively in early 1964, following the fighting of the Cyprus crisis of 1963–64 that broke out in the city. This separation became a militarised border between the internationally recognised Republic of Cyprus and the self declared "TRNC" after Turkey invaded the island of Cyprus in 1974, illegally occupying the north of the island, including northern Nicosia.

Apart from its legislative and administrative functions, Nicosia has established itself as the island's financial capital and its main international business centre. In 2018, Nicosia was the 32nd richest city in the world in relative purchasing power.