EK may refer to:
- Ek Commando Knife Co., a US knife manufacturer
- Ek Park, a cricket ground in Kitwe, Zambia
- East Kilbride, a large town in South Lanarkshire, Scotland
- Eastern Kentucky Railway's reporting mark
- Emirates (airline) IATA airline designator
- Enchanted Kingdom, a theme park in the Philippines
- Equatorial Guinea's FIPS 10-4 and NATO country code
- Esperanta Klavaro, a computer program which allows Esperanto letters in Windows
- Exakelvin, an SI unit of temperature
- Lady Ek' Naah
- Mitsubishi eK, a Japanese kei car
- Elinkeinoelämän keskusliitto, Confederation of Finnish Industries
- Eckankar, Religion of the Light and Sound of God
- Eastman Kodak, a bankrupt American based international photography corporation whose former NYSE ticker symbol was EK
- Early Cretaceous
- European Kindred, a white supremacist prison and street gang.
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