Ivan McLannahan Cecil Power (29 November 1903 – 13 February 1954) was a British diplomat and politician, who served on London County Council.
He joined the diplomatic service, working in Berlin, then in Australia, including a period as secretary to the Speaker of the Australian House of Representatives.
In England, Power worked for the Empire Parliamentary Association, and in 1934 became chairman of the Stepney Housing Trust.
He was also appointed as a member of the British Delegation to the League of Nations, where he met Mari Stevenson.
However, he resigned his seat in 1940, in order to serve in the Royal Air Force during the Second World War.