A military brat, Douglas MacArthur was born 26 January 1880, at Little Rock Barracks, Little Rock, Arkansas, to Arthur MacArthur, Jr., a U.S. Army captain, and his wife, Mary Pinkney Hardy MacArthur (nicknamed "Pinky").
Sebagai seorang anak tentara, Douglas MacArthur lahir pada 26 Januari 1880, di Barak Little Rock, Little Rock, Arkansas, dari pasangan Arthur MacArthur, Jr., seorang kapten Angkatan Darat AS, dan istrinya, Mary Pinkney Hardy MacArthur (dijuluki "Pinky").