James Ramsay MacDonald was a British statesman and politician who served as Prime Minister of the United Kingdom, the first who belonged to the Labour Party, leading minority Labour governments for nine months in 1924 and again between 1929 and 1931. From 1931 to 1935, he headed a National Government dominated by the Conservative Party and supported by only a few Labour members. MacDonald was expelled from the Labour Party as a result.

The first MacDonald ministry of the United Kingdom lasted from January to November 1924. The Labour Party, under Ramsay MacDonald, had failed to win the general election of December 1923, with 191 seats, although the combined Opposition tally exceeded that of the Conservative government, creating a hung parliament. Stanley Baldwin remained in office until January 1924.