HHK

HHK can mean:


 * Happy Hacking Keyboard
 * Henry H. Kennedy, Jr. (born 1948), United States District Judge
 * Ho-Ho-Kus, New Jersey, United States
 * Marching and Cycling Band HHK, a Dutch music association
 * Republican Party of Armenia (Armenian: Հայաստանի Հանրապետական Կուսակցություն, ՀՀԿ, Hayastani Hanrapetakan Kusaktsutyun)
 * Restored Reformed Church (Dutch: Hersteld Hervormde Kerk), a Christian denomination in the Netherlands
 * Hybrid Histidine Kinase, a protein in fungal cells