Eiken may refer to:
Places Norway Eiken Municipality, a former municipality in the old Vest-Agder county Eiken, Agder, a village in Hægebostad municipality in Agder county Eiken Church, a church in Hægebostad municipality in Agder county
Switzerland Eiken, Aargau, a municipality in the district of Laufenburg in the canton of Aargau
People with the given name , Japanese equestrian
Other uses Eiken (studio), an anime studio based in Tokyo, Japan STEP Eiken, a Japanese examination on the English language Eiken (manga), a manga/anime series Eiken syndrome, a rare autosomal bone dysplasia Eiken Chemical, a Japanese company headquartered in Tokyo