Delay line may refer to:

• Propagation delay, the length of time taken for something to reach its destination
• Analog delay line, used to delay a signal
• Bi-directional delay line, a numerical analysis technique used in computer simulation for solving ordinary differential equations by converting them to hyperbolic equations
• Digital delay line, a sequential logic element
• Delay-line memory, a form of computer memory used on some of the earliest digital computers
• Detcord delay line loops

• All pages with titles beginning with Delay line
• All pages with titles containing Delay line
• Delay (disambiguation)
• Line (disambiguation)