The Emirate of Crete (Arabic: إقريطش, romanized: Iqrīṭish or إقريطية, Iqrīṭiya; Greek: Κρήτη, romanized: Krētē) was an Arab Islamic state that existed on the Mediterranean island of Crete from the late 820s to the reconquest of the island by the Byzantine Empire in 961. Although the emirate recognized the suzerainty of the Abbasid Caliphate and maintained close ties with Tulunid Egypt, it was de facto independent.

A group of Arab Andalusian exiles led by Abu Hafs Umar al-Iqritishi conquered Crete in either 824 or 827/828, and established an independent Islamic state. The Byzantines launched a campaign that took most of the island back in 842-43 under Theoktistos, but the reconquest was not completed and would soon be reversed. Later attempts by the Byzantine Empire to recover the island failed, and for the approximately 135 years of its existence, the emirate was one of the major foes of Byzantium. Crete commanded the sea lanes of the Eastern Mediterranean and functioned as a forward base and haven for Muslim corsair fleets that ravaged the Byzantine-controlled shores of the Aegean Sea. The emirate's internal history is less well known, but all accounts point to considerable prosperity deriving not only from piracy but also from extensive trade and agriculture. The emirate was brought to an end by Nikephoros Phokas, who successfully campaigned against it in 960–961, re-annexing the island to the Byzantine Empire.

Crete had been raided by Muslim forces since the first wave of the Muslim conquests in the mid-7th century. It first experienced a raid in 654 and then another in 674/675, and parts of the island were temporarily occupied during the reign of the Umayyad Caliph al-Walid I (r. 705–715). However, the island at that time was not conquered and despite occasional raids in the 8th century, it remained securely in Byzantine hands; Crete was too far from the Arab naval bases in the Levant for an effective expedition to be undertaken against it.

At some point in the second half of the reign of Byzantine Emperor Michael II (r. 820–829), a group of Andalusian exiles landed on Crete and began its conquest. These exiles had a long nomadic history. Traditionally they have been described as the survivors of a failed revolt against the emir al-Hakam I of Córdoba in 818. In the aftermath of the revolt's suppression, the citizens of the Córdoban suburb of al-Rabad were exiled en masse. Some settled in Fez in Morocco, but others, numbering over 10,000, took to piracy, probably joined by other Andalusians. They landed in Alexandria and took control of the city until 827, when they were besieged and expelled by the Abbasid general Abdullah ibn Tahir al-Khurasani. As W. Kubiak points out, however, the supposed origin from Córdoba is contradicted by other sources, which record the presence of Andalusian corsairs in Alexandria as early as 798/9, and their takeover is dated to 814, before the revolt took place; furthermore, the Andalusians' leader, Umar ibn Hafs ibn Shuayb ibn Isa al-Balluti, commonly known as Abu Hafs, came from a locality (Fahs al-Ballut, now Los Pedroches) that was far from Córdoba.

The exact chronology of the Andalusians' landing in Crete is uncertain. Following the Muslim sources, it is usually dated to 827 or 828, after the Andalusians' expulsion from Alexandria. Byzantine sources however seem to contradict this, placing their landing soon after the suppression of the large revolt of Thomas the Slav (821–823). Further considerations regarding the number and chronology of the Byzantine campaigns launched against the invaders and prosopographical questions of the Byzantine generals that headed them have led other scholars like Vassilios Christides and Christos Makrypoulias to propose an earlier date, c. 824. Under the terms of their agreement with Ibn Tahir, the Andalusians and their families left Alexandria in 40 ships. Historian Warren Treadgold estimates them at some 12,000 people, of whom about 3,000 would be fighting men. According to Byzantine historians, the Andalusians were already familiar with Crete, having raided it in the past. They also claim that the Muslim landing was initially intended as a raid, and was transformed into a bid for conquest when Abu Hafs himself set fire to their ships. However, as the Andalusian exiles had brought their families along, this is probably later invention. The Andalusians' landing-place is also unknown; some scholars think that it was at the north coast, at Suda Bay or near where their main city and fortress Chandax (Arabic: ربض الخندق, romanized: rabḍ al-kḫandaq, lit. 'Castle of the Moat', modern Heraklion) was later built, but others think that they most likely landed on the south coast of the island and then moved to the more densely populated interior and the northern coast.

As soon as Emperor Michael II learned of the Arab landing, and before the Andalusians had secured their control over the entire island, he reacted and sent successive expeditions to recover the island. Losses suffered during the revolt of Thomas the Slav hampered Byzantium's ability to respond, however, and if the landing occurred in 827/828, the diversion of ships and men to counter the gradual conquest of Sicily by the Tunisian Aghlabids also interfered. The first expedition, under Photeinos, strategos of the Anatolic Theme, and Damian, Count of the Stable, was defeated in open battle, where Damian was killed. The next expedition was sent a year later and comprised 70 ships under the strategos of the Cibyrrhaeots Krateros. It was initially victorious, but the overconfident Byzantines were then routed in a night attack. Krateros managed to flee to Kos, but there he was captured by the Arabs and crucified. Makrypoulias suggests that these campaigns must have taken place before the Andalusians completed their construction of Chandax, where they transferred the capital from the inland site of Gortyn.

Abu Hafs repulsed the early Byzantine attacks and slowly consolidated control of the entire island. He recognized the suzerainty of the Abbasid Caliphate, but ruled as a de facto independent prince. The conquest of the island was of major importance as it transformed the naval balance of power in the Eastern Mediterranean and opened the hitherto secure Aegean Sea littoral to frequent and devastating raids.

The Andalusians also occupied several of the Cyclades during these early years, but Michael II organized another large-scale expedition, recruiting an entire new marine corps, the Tessarakontarioi, and building new ships. Under the admiral Ooryphas, this fleet managed to evict the Arabs from the Aegean islands but failed to retake Crete. Michael II's successor Theophilos (r. 829–842) sent an embassy to Abd ar-Rahman II of Córdoba proposing a joint action against the Andalusian exiles, but beyond Abd ar-Rahman giving his assent to any Byzantine action against Crete, this came to nothing. In October 829, those Arabs destroyed an imperial fleet off Thasos, undoing much of the work of Ooryphas and opening the Aegean and its coasts to pillage. Later they attacked Euboea (c. 835–840), Lesbos (837), and the coasts of the Thracesian Theme, where they destroyed the monastic centre of Mount Latros. They were heavily defeated, however, by the local strategos, Constantine Kontomytes.