A coil stamp is a type of postage stamp sold in strips one stamp wide. The name derives from the usual handling of long strips, which is to coil them into rolls, in a manner reminiscent of adhesive tape rolls.

The perforations of coil stamps are usually found along the right and left sides of stamps (Horizontal Coil Stamps with Vertical Perforation), Also they have been produced with perforations along the top and bottom (Vertical Coil Stamps with Horizontal Perforation).