Ian Pirie MacDonald HonFRPS[1] (January 27, 1867 – April 22, 1942) was an American portrait photographer, New York City civic leader, and peace advocate.

[2] He photographed over 70,000 men in the span of his career, including international heads of state, religious leaders, and artists.

[3][4] Born in Chicago, MacDonald moved to Hudson, New York in 1883, where he worked as a photographer's apprentice prior to opening his own studio in Albany.

[3][5] His prolific body of work encompasses many well-known men of the early to mid-20th century including Spencer Trask, Woodrow Wilson, William Ralph Inge, Seán O'Casey and Antoine Lumiére,[5] all of which were taken within New York City save for Tomáš Garrigue Masaryk and Christian X of Denmark.

[9] MacDonald had a cerebral hemorrhage at White Oak Shade on April 18, 1942, and died at a New York hospital four days later.