William Lunn

William Lunn (1 November 1872 – 17 May 1942) was a Labour Party politician in the United Kingdom.

He was elected at the 1918 general election as Member of Parliament (MP) for the newly created Rothwell constituency in West Yorkshire, and held the seat until he died in office in 1942, aged 69.

In 1924, Lunn served in Ramsay MacDonald's short-lived First Labour Government as Secretary for Overseas Trade, a junior ministerial post subordinate to the President of the Board of Trade.

When the Second Labour Government took office in June 1929, Lunn was appointed as Under-Secretary of State for the Colonies. He was moved in December that year to the post of Under-Secretary of State for Dominion Affairs, and held that position until the formation of the National Government in August 1931.