Okello (also spelled Okelo) is a common surname of the Luo and Ateker peoples of Uganda, Kenya and Sudan. It may refer to:
People Okello Oculi (1942–2025), Ugandan novelist and poet Allan Okello (born 2000), Ugandan footballer Bazilio Olara-Okello (1929–1990), Ugandan military officer and de facto head of state of Uganda David Okello (born 1986), Kenyan footballer Emmy Okello (born 1977), Ugandan consultant physician Esther Okello Lutwa (died 2002), Ugandan first lady and politician Galdino Moro Okello (born 1940), Ugandan judge Henry Oryem Okello (born 1960), Ugandan politician James Okello (born 1990), Ugandan basketball player John Okello (1937–1971), Ugandan-born leader of the Zanzibar revolution Noble Okello (born 2000), Ugandan footballer Tito Okello (1914–1996), Ugandan military officer and politician, president of Uganda (1985–1986)
Other uses Okello, a character in the 1972 film Aguirre, the Wrath of God