C2D may refer to:

• Intel Core 2 Duo, a microprocessor line by Intel
• Crash to desktop, in computing, an event where a program exits abnormally

• Crank journal
• Crank machine
• Crank position sensor
• Crank-rocker
• Crank ships
• Crank-sided
• Crank, Thomas
• Crankworx
• Cranleigh F.C.
• Cranleigh Line
• Cranley, Thomas
• Cranmer Award for Worship
• Cranmer, Michael
• Cranmer Station
• Cranmer (surname)
• Cranmer, Thomas
• Crannagh
• Cranopsis aucoinae
• Cranopsis bocourti
• Cranopsis coccifer
• Cranopsis floris
• Cranopsis ibarrai
• Cranopsis leucomyos
• Cranopsis luetkenii
• Cranopsis macrocristatus