亚瑟·梅尔·史列辛格二世（Arthur Meier Schlesinger Jr.，1917年10月15日－2007年2月28日1917年10月15日–2007年2月28日）是一位美国的历史学家及社会评论家，致力于探讨美国政治人物诸如小罗斯福、约翰·甘迺迪与罗伯特·弗朗西斯·甘迺迪的自由主义政策。因为获得了普立兹奖，史列辛格于1961至1963年间担任甘迺迪总统的特别助理及御用历史学者。他详细地记录了甘迺迪任职期间所发生的事，并名之为《一千个日子》。 1968年，史列辛格帮罗伯特·弗朗西斯·甘迺迪参议员助选，直至罗伯特·甘迺迪于洛杉矶遭人暗杀为止。几年后，他为罗伯特·甘迺迪立传。 尼克森总统任职期间，他出版《帝王总统》一书，使这个词广为流传。他也是Harry Truman的死忠支持者。

Arthur Meier Schlesinger Jr. (/ˈʃlɛsɪndʒər/; born Arthur Bancroft Schlesinger; October 15, 1917 – February 28, 2007) was an American historian, social critic, and public intellectual and was the son of the influential historian Arthur M. Schlesinger Sr. A specialist in American history, much of Schlesinger's work explored the history of 20th-century American liberalism. In particular, his work focused on leaders such as Harry Truman, Franklin D. Roosevelt, John F. Kennedy, and Robert F. Kennedy. In the 1952 and 1956 presidential campaigns, he was a primary speechwriter and adviser to the Democratic presidential nominee both times, Adlai Stevenson II. Schlesinger served as special assistant and "court historian" to President Kennedy from 1961 to 1963. He wrote a detailed account of the Kennedy administration, from the 1960 presidential campaign to the president's state funeral, titled A Thousand Days: John F. Kennedy in the White House, which won the 1966 Pulitzer Prize for Biography or Autobiography.