The Leander-class light cruisers were designed in the late 1920s under the influence of the York-class heavy cruisers. However, the Leander-class differed from previous light cruisers by placing a higher emphasis on seaworthiness and operating range, rather than on protection and firepower. This was done with the aim to make the Leander-class light cruisers more suitable for the commerce protection role.

Initially, five ships of the Leander-class were ordered in the early 1930s, with HMS Leader as the lead ship being laid down in September 1930. Leander was completed a year later and commissioned into service in March 1933. Initially, the warship served with the New Zealand Division of the Royal Navy, before being transferred to the Royal New Zealand Navy after its formation in 1941. From there onwards, the ship sailed under its new designation HMNZS Leander.

Leander primarily served in the Pacific theatre during WW2, taking part in several smaller operations during her early service life. Leander was also briefly stationed in the Mediterranean, supporting allied troops in actions against Vichy France during the Syria-Lebanon campaign. After that, Leander once again returned to the Pacific, where she was severely damaged after an engagement with a small Japanese task force in July 1943. The damage suffered from a torpedo hit was so severe that it rendered Leander inoperable for the remainder of the war, until she was repaired in August 1945.

HMNZS Leander only had a very short post-war service life. The warship was officially decommissioned in 1948 and sold for scrap in 1950.