The Dominion of Newfoundland was a country in eastern North America, today the modern Canadian province of Newfoundland and Labrador. It was established on 26 September 1907, and confirmed by the Balfour Declaration of 1926 and the Statute of Westminster of 1931. It included the island of Newfoundland, and Labrador on the continental mainland. Newfoundland was one of the original dominions within the meaning of the Balfour Declaration and accordingly enjoyed a constitutional status equivalent to the other dominions of the time.

In 1934, Newfoundland became the only dominion to give up its self-governing status, which ended 79 years of self-government. That episode came about because of a crisis in Newfoundland's public finances in 1932. Newfoundland had accumulated a significant amount of debt by building a railway across the island, which was completed in the 1890s, and by raising its own regiment during World War I. In November 1932, the government warned that Newfoundland would default on payments on the public debt. The British government quickly established the Newfoundland Royal Commission to inquire into and report on the position. The commission's report, published in October 1933, recommended that Newfoundland give up self-government temporarily and allow the United Kingdom to administer it by an appointed commission.The Newfoundland parliament accepted the recommendations and presented a petition to the King to ask for the suspension of the constitution and the appointment of commissioners to administer the government until the country became self-supporting again. To enable compliance with the request, the British Parliament passed the Newfoundland Act 1933, and on 16 February 1934, the British government appointed six commissioners, three from Newfoundland and three from the United Kingdom, with the Governor as chairman. The system of a six-member Commission of Government continued to govern Newfoundland until it joined Canada in 1949 to become Canada's tenth province.