HSOB may refer to one of many things:

• El Obeid Airport, in Sudan, has the ICAO code HSOB
• High School Old Boys the name of many sporting and alumni organisations, among them:
  • Cardiff HSOB RFC, a Welsh rugby union club
  • Christchurch High School Old Boys, a New Zealand football club
  • Douglas High School Old Boys A.F.C., a Manx football club
  • Dunedin High School Old Boys, a defunct New Zealand football club
  • High School Old Boys RFC, a New Zealand rugby union club
  • Invercargill High School Old Boys, a defunct New Zealand football club
  • Melbourne High School Old Boys Association, an Australian sporting and alumni organisation
  • Napier High School Old Boys, a defunct New Zealand football club
  • Newport HSOB RFC, a Welsh rugby union club

This disambiguation page lists articles associated with the title HSOB.
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