A label printer is a computer peripheral that prints on self-adhesive label material and sometimes card-stock (also called tags). Label printers are different from ordinary printers because they need to have special feed mechanisms to handle rolled stock, or tear sheet (fanfold) stock. Common connectivity for label printers include RS-232 serial, USB serial, parallel, Ethernet and wireless.

When printing on continuous label stock, there is a tendency for the print location to shift slightly from label to label. To ensure registration of the print area with the target media, label printers use a sensor that detects a gap, notch, line or perforation between labels. This allows the printer to adjust the intake of label stock so that the print aligns correctly with the media.

Label printers have a wide variety of applications, including supply chain management, retail price marking, shipping labels, blood and laboratory specimen marking, and fixed assets management.