Eka or EKA may refer to:
- A prefix used to name chemical elements predicted by Mendeleev
- Murray Field, an airport which has IATA airport code EKA
- David W. Eka, an African church leader
- Eka Darville, an Australian actor
- EKA (supercomputer), a supercomputer developed by Tata Sons
- Eesti Kunstiakadeemia (Estonian Academy of Arts)
- EKA (knives), a Swedish knives manufacturer
- Engaging Key Assets (EKA), a type of leadership style