君主  (1829年十月5日～1886年十一月18日)

開端 終結 在位 1881年 1885年 

　　切斯特·艾倫·阿瑟（Chester Alan Arthur，1829年10月5日－1886年11月18日），原為詹姆斯·加菲爾德的副總統。1881年7月2日總統詹姆斯·加菲爾德遇刺，於在9月19日死亡後，隨即接任為美國第二十一任總統(1881年9月19日 – 1885年3月4日)。任職期間他簽署了排華法案。

　　Chester Alan Arthur (October 5, 1829 – November 18, 1886) was an American politician who served as the 21st President of the United States. Arthur was a member of the Republican Party and worked as a lawyer before becoming the 20th Vice President under James Garfield. While Garfield was mortally wounded by Charles J. Guiteau on July 2, 1881, he did not die until September 19, at which time Arthur was sworn in as president, serving until March 4, 1885.
　　
　　Before entering elected politics, Arthur was a member of the Stalwart faction of the Republican Party and a political protégé of Roscoe Conkling, rising to Collector of the Port of New York, a position to which he was appointed by President Ulysses S. Grant. He was then removed by the succeeding president, Rutherford B. Hayes, in an effort to reform the patronage system in New York.
　　
　　To the chagrin of the Stalwarts, the onetime Collector of the Port of New York became, as President, a champion of civil service reform. He avoided old political cronies and eventually alienated his old mentor Conkling. Public pressure, heightened by the assassination of Garfield, forced an unwieldy Congress to heed the President. Arthur's primary achievement was the passage of the Pendleton Civil Service Reform Act. The passage of this legislation earned Arthur the moniker "The Father of Civil Service" and a favorable reputation among historians.
　　
　　Publisher Alexander K. McClure wrote, "No man ever entered the Presidency so profoundly and widely distrusted, and no one ever retired… more generally respected." Author Mark Twain, deeply cynical about politicians, conceded, "It would be hard indeed to better President Arthur's administration."