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: {{lang|hy|Հայաստանի Հանրապետական Կուսակցություն, ՀՀԿ,}} {{lang|hy|Hayastani Hanrapetakan Kusaktsutyun}})
Restored Reformed Church (Dutch: {{lang|nl|Hersteld Hervormde Kerk}}), a Christian denomination in the Netherlands
Hybrid Histidine Kinase, a protein in fungal cells