The BVG Class HK is a type of electric multiple unit in service on the Berlin U-Bahn. It is operated by Berliner Verkehrsbetriebe (BVG) (Berlin Transport Company).

The HK is a Kleinprofil (small profile) variant of the larger Großprofil (large profile) H series.

The HK series primarily operates on the U2 line.^{[citation needed]}