Breach may refer to:

• Breach (comics), a 2005 comic book series from DC Comics
• (Breach), a 2000 album by The Wallflowers
• Breaching, a form of whale behaviour
• Breach (film), an upcoming film directed by Billy Ray
• Breach (band), a musical group under the Burning Heart label
• Nicholas Breach, a photographer
• "The Breach (Enterprise episode)", a second season episode of Star Trek: Enterprise.
• Breach, in fortification, the ruins made in any part of a structure by a destructive weapon, in order to storm the place, or take it by assault

In law:

• Breach of contract, a situation in which a binding agreement or bargained-for exchange is not honored by one or more of the parties to the contract by non-performance or interference with the other party's performanc
• Fundamental breach or repudiatory breach, a breach so fundamental that it permits the aggrieved party to terminate performance of the contract, in addition to entitling that party to sue for damages
• Breach of the peace