Crust may refer to:Geology and soil science:

• Crust (geology), the outer solid layer of a planet
• Continental crust
• Oceanic crust
• Soil crustMusic:
• Crust punk, a hardcore punk / extreme metal fusion
• Crust (band), a psychedelic Texas band
• Crust (EP), an EP by Brazilian metal band Sarcófago
• Crust (album), an album by Italian metal band SadistCrust may also refer to:
• In forest fires, crust is something that covers trees to slow the fire
• The outer layer of a loaf of bread