Ibiza (Catalan: Eivissa, Catalan pronunciation: [/əjˈβisə/]) is a Spanish island in the Mediterranean Sea off the eastern coast of Spain. It is 150 kilometres (93 miles) from the city of Valencia. It is the third largest of the Balearic Islands, an autonomous community of Spain. Its largest settlements are Ibiza Town (Catalan: Vila d’Eivissa, or simply Vila), Santa Eulària des Riu, and Sant Antoni de Portmany. Its highest point, called Sa Talaiassa (or Sa Talaia), is 475 metres (1,558 feet) above sea level.

Ibiza has become well known for its association with nightlife, electronic dance music, and for the summer club scene, all of which attract large numbers of tourists drawn to that type of holiday. Several years before 2010, the island’s government and the Spanish Tourist Office had been working to promote more family-oriented tourism, with the police closing down clubs that played music at late night hours, but by 2010 this policy was reversed. Around 2015 it was resumed.

Ibiza is a UNESCO World Heritage Site. Ibiza and the nearby island of Formentera to its south are called the Pine Islands, or “Pityuses”.

The official Catalan name is Eivissa (pronounced [əjˈβisə]). Its name in Spanish is Ibiza (pronounced [iˈβiθa]). In British English, the name is usually pronounced in an approximation of the Spanish /aɪˈbiːθə/, whereas in American English the pronunciation is closer to Latin American Spanish (/ɪˈbiːzə/, /iːˈbiːsə/).

Phoenician colonists called the island Ibossim or Iboshim (Phoenician: 𐤀𐤁𐤔𐤌, ʾbšm, “Dedicated to Bes”). It was later known to Romans as Ebusus. The Greeks called the two islands of Ibiza and Formentera the Pityoûssai (Πιτυοῦσσαι, “Pine-Covered Islands”).

In the 18th and 19th centuries the island was known to the British and especially to the Royal Navy as Ivica.