Eureka henfører ofte til: Heureka – eller eureka – et kendt udråb der tilskrives Arkimedes.
Eureka kan også henvise til:
Steder Canada Eureka, Nova Scotia Eureka, Nunavut Eureka Pass, Axel Heiberg Island, Nunavut Eureka Sound, Nunavut
USA Eureka, Californien, større amerikanske by med navnet Eureka, Nevada County, Californien Eureka, Colorado Eureka, Illinois Eureka College Eureka, Lawrence County, Indiana, et kommunefri område Eureka, Spencer County, Indiana, et kommunefri område Eureka, Kansas Eureka, Missouri Eureka, Perry County, Missouri Eureka, Montana Eureka, Nevada Eureka, North Carolina Eureka, Pennsylvania Eureka, South Carolina Eureka, South Dakota Eureka, Texas Eureka, Utah Eureka (Baskerville, Virginia) Eureka, Washington Eureka, West Virginia Eureka, Polk County, Wisconsin, en by Eureka, Winnebago County, Wisconsin, et kommunefri område Eureka Center, Minnesota Eureka Center, Wisconsin Eureka County, Nevada Eureka Springs, Arkansas Eureka Township, Adair County, Iowa Eureka Township, Michigan Eureka Township, Dakota County, Minnesota Eureka Township, Valley County, Nebraska Eureka Valley (Inyo County), Californien Eureka Valley, San Francisco, Californien
Andre Steder Eureka, Victoria Eureka! (museum) i Halifax, West Yorkshire
Medier Eureka (tv-serie) – amerikansk tv-serie skabt af Andrew Cosby og Jaime Paglia Eureka (film fra 1983) – britisk-amerikansk dramafilm af Nicolas Roeg
Andet (5261) Eureka – trojansk asteroide ved Mars