A DIN connector is a connector that was originally standardized by the Deutsches Institut für Normung (DIN), the German national standards organization. There are DIN standards for a large number of different connectors, therefore the term "DIN connector" alone does not unambiguously identify any particular type of connector unless the document number of the relevant DIN standard is added (e.g., "DIN 41524 connector"). In the context of consumer electronics, the term "DIN connector" commonly refers to a member of a family of circular connectors that were initially standardized by DIN for analog audio signals. Some of these connectors have later also been used in analog video applications and for digital interfaces such as MIDI or the IBM PS/2 computer keyboard and mouse cables. The original DIN standards for these connectors are no longer in print and have been replaced with the equivalent international standard IEC 60130-9.

While DIN connectors are superficially similar to the newer professional XLR connectors, they are not compatible.