The Colonial Secretary of New Zealand was an office established in 1840 and abolished in 1907. The position should not be confused with the Colonial Secretary of the former Colonial Office of the United Kingdom.
Along with the Chief Justice, the office was one of the first four created by Governor William Hobson when he arrived in New Zealand in January 1840. The Colonial Secretary's Office handled the creation of New Zealand's public service, and became the modern Department of Internal Affairs in 1907. The Colonial Secretary became known as the Minister of Internal Affairs from then on.
The Colonial Secretary was considered the deputy of the Governor, until the granting of responsible government. For example, Willoughby Shortland acted as administrator of government following the death of William Hobson in 1841. Henry Sewell, who is considered by some as the first Premier of New Zealand, held the position for his short tenure as head of the government in 1856.