A CEO, or chief executive officer, is the highest-ranking corporate officer in an organisation.

CEO may also refer to:

• CEO (Data General), or Comprehensive Electronic Office, a 1981 suite of office automation software
• Center for Equal Opportunity, an American conservative think tank
• Chief Electoral Officer (disambiguation), an electoral oversighter
• Chief experimental officer, head of an experimental organization
• Civil enforcement officer, a person who enforces, parking, traffic, and other laws
• Civilian enforcement officer, an official of Her Majesty's Courts and Tribunals Service in the UK
• Community Effort Orlando, an annual fighting game event
• Corporate Europe Observatory, a non-profit research and campaign group
• Waco Kungo Airport, Angola (IATA code)

• Ceo (musician), the solo project of Eric Berglund
• "CEO", a 2021 song by Netta Barzilai
• "CEO", a 2021 song by Snoop Dogg from From tha Streets 2 tha Suites
• The CEO, a 2016 Nigerian film

• Ceos, Latin name for the Greek island of Kea in the Cyclades archipelago
• Committee on Earth Observation Satellites
• Child Exploitation and Obscenity Section, of the United States Department of Justice Criminal Division
• All pages with titles beginning with CEO
• All pages with titles beginning with Ceo
• All pages with titles containing ceo