Eureka is a small eastern suburb of Ballarat, Victoria, Australia. It was originally part of Ballarat East but became its own suburb in 1946 in recognition of the area’s significance to Australian history. Eureka is bordered by Specimen Creek to the north, Canadian Creek to the south, Queen and Joseph streets to the west and Kline and Stawell Street to the east. The suburb takes its name from the Eureka Lead – a lead is an ancient river bed that contains gold – of the Eureka Mining Company and is most notable as the site of the historic event of the Eureka Rebellion. This was the site where the rebel miners flew the Eureka Flag for the first time; a flag that has since become a symbol of the working class and trade union movement and, at times, Australian republicanism.

Eureka does not have a main commercial area and is almost entirely residential. The Buninyong railway line bisects the suburb, however the line is disused and the station has been closed for nearly a century. Bus route number 15 (Ballarat Station – Brown Hill) currently services the Eureka community.