Heka can refer to:
- Heka (god), the deification of magic in Egyptian mythology
- Lambda Orionis, a star in the constellation of Orion, also known by the traditional names "Meissa" and "Heka"
- AMD Phenom II, core name for a triple-core in the Phenom II CPU-line from AMD.
- Heka (hekad), an open source stream processing software system developed by Mozilla.
Heka (; ; also spelled Hike) was the deification of magic in ancient Egypt. The name is the Egyptian word for "magic". According to Egyptian writing (Coffin text, spell 261), Heka existed "before duality had yet come into being." The term "Heka" was also used to refer to the practice of magical rituals.