Eureka is an unincorporated community in Luce Township, Spencer County, in the U.S. state of Indiana.

[4] A post office was established at Eureka in 1872, and remained in operation until it was discontinued in 1921.

[5] Tradition has it the community was so named after a pioneer exclaimed "Eureka!"

The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

This Spencer County, Indiana location article is a stub.