Ariel Sharon (Hebrew: אֲרִיאֵל שָׁרוֹן; IPA: [aʁiˈ(ʔ)el ʃaˈʁon] (listen); Ariʼēl Sharōn; also known by his diminutive Arik, אָרִיק‎, born Ariel Scheinermann, אֲרִיאֵל שַׁיינֶרְמָן‎; 26 February 1928 – 11 January 2014) was an Israeli general and politician who served as the 11th Prime Minister of Israel from March 2001 until April 2006.

Sharon was a commander in the Israeli Army from its creation in 1948. As a soldier and then an officer, he participated prominently in the 1948 Palestine war, becoming a platoon commander in the Alexandroni Brigade and taking part in many battles, including Operation Bin Nun Alef. He was an instrumental figure in the creation of Unit 101 and the reprisal operations, as well as in the 1956 Suez Crisis, the Six-Day War of 1967, the War of Attrition, and the Yom-Kippur War of 1973. Yitzhak Rabin called Sharon "the greatest field commander in our history".

Upon retirement from the military, Sharon entered politics, joining the Likud party, and served in a number of ministerial posts in Likud-led governments in 1977–92 and 1996–99. As Minister of Defense, he directed the 1982 Lebanon War. An official enquiry found that he bore "personal responsibility" for the Sabra and Shatila massacre and recommended that he be removed as Defense Minister. His role in the massacre led to him being known as the "Butcher of Beirut" among Arabs.

From the 1970s through to the 1990s, Sharon championed construction of Israeli settlements in the West Bank and Gaza Strip. He became the leader of the Likud in 2000, and was elected Prime Minister of Israel after defeating Ehud Barak in the 2001 prime ministerial election. He served as Israel's prime minister from 2001 to 2006, during the Al-Aqsa Intifada. As Prime Minister, Sharon orchestrated Israel's unilateral disengagement from the Gaza Strip in 2004–05. Facing stiff opposition to this policy within the Likud, in November 2005 he left Likud to form a new party, Kadima. He had been expected to win the next election and was widely interpreted as planning on "clearing Israel out of most of the West Bank", in a series of unilateral withdrawals. After suffering a stroke on 4 January 2006, Sharon remained in a permanent vegetative state until his death in January 2014.

Sharon remains a highly polarizing figure in Middle East history. Israelis almost universally revere Sharon as a war hero and statesman who played a vital role in defining the country's borders, whereas Palestinians revile Sharon as a war criminal who suppressed their aspirations for statehood.