Brian O'Sullivan (disambiguation)

Brian O'Sullivan is a hurler for Waterford.

Brian or Bryan O'Sullivan may also refer to:

• Brian O'Sullivan (Gaelic footballer), see Noel O'Leary
• Brian O'Sullivan (swimmer), participated in Swimming at the 2011 European Youth Summer Olympic Festival
• Bryan O'Sullivan, Limerick hurler
• Bryan O'Sullivan (computer programmer), technical writer, programmer; leading author of the Real World Haskell book