HMS Euryalus was a Cressy-class armoured cruiser built for the Royal Navy around 1900. Badly damaged by multiple accidents while fitting out, she was not completed until 1904. She became flagship of the Australia Station that year and was reduced to reserve upon her return in 1905. Recommissioned in 1906, she became a training ship for the North America and West Indies Station before being placed in reserve with the Third Fleet in 1909.