KBO can refer to:

• Kapamilya Box Office, a Philippine free-to-air television channel
• KBÖ, Communist League of Austria
• KBO!, a hardcore punk band from Serbia
• Kuiper belt object
• Keep the Bastards Out, a fictional organization invented by Seattle Post-Intelligencer columnist Emmett Watson
• Korea Baseball Organization
• Kosi Bird Observatory, Nepal
• kbo, Kaliko language
• IATA code of Kabalo Airport, an airport in the Democratic Republic of the Congo

• Semso Tucakovic
• SEM study
• Sem Sæland
• Semtech Corp
• Semtech solutions
• Semtech Solutions
• Semtek International Inc. v. Lockheed Martin Corp.
• Semtenga
• Sem Terras
• Semtes
• Semt Garajı railway station
• SEM, Tsinghua
• Semtín
• Semtěš
• Semudera
• Semum
• Semumoh
• Semu people
• Semur (disambiguation)
• Semuren
• Semur en Brionnais
• Semur-en-Vallon
• Semussac
• Semustine
• Semuta pristina