Captain William Hobson (26 September 1792 – 10 September 1842) was a British Royal Navy officer who served as the first Governor of New Zealand. He was a co-author of the Treaty of Waitangi.

Hobson was dispatched from London in July 1839, with instructions to take the constitutional steps needed to establish a British colony in New Zealand. He was sworn in as Lieutenant-Governor in Sydney (under George Gipps) and arrived in New Zealand on 29 January 1840.

On 5 February 1840, Hobson met with Māori chiefs at Waitangi, and the following morning they signed a treaty by which the chiefs purportedly voluntarily transferred sovereignty to the British Crown in return for guarantees respecting their lands and possessions and their rights as British subjects. Three months later, Hobson proclaimed British sovereignty over the islands of New Zealand. He also selected the site for a new capital, which he named Auckland.

In May 1841, New Zealand was constituted as a separate Crown colony, with Hobson promoted to Governor and Commander in Chief. In his final months Hobson was dogged by poor health which left him detached from political affairs. He died in office in September 1842.