Air Vice Marshal Sir Norman Duckworth Kerr MacEwen, CB, CMG, DSO (8 November 1881 – 29 January 1953) was a senior commander in the Royal Air Force during the first half of the 20th century.

In 1901, following officer training at the Royal Military College, Sandhurst, MacEwen was commissioned into the Argyll and Sutherland Highlanders.

As a junior officer he saw service in South Africa in the early years of the 20th century.

At some stage in either the second half of 1915 or the early months of 1916, MacEwan went on to take up duties in the Royal Flying Corps.

On 1 April 1918, like other members of the Royal Flying Corps, MacEwen transferred to the RAF on its establishment.