Eureka, Utah
The city was named from the Greek word "eureka", meaning "I have found it!" The city and its history was explored on the show "Ghost Adventures" in 2018.
Eureka, Spencer County, Indiana
Eureka was laid out in 1858. A post office was established at Eureka in 1872, and remained in operation until it was discontinued in 1921. Tradition has it the community was so named after a pioneer exclaimed "Eureka!" when he came upon the site.