List of Quaker members of the United States Congress

As of 2023^[update], twenty-four Quakers have ever been elected to the United States Congress, the first being John Chew Thomas in 1799. One Quaker currently serves in the Congress.

Senator		Party		State	Term			Notes
					Start	End	Length of service (days)
	William Windom		Republican	Minnesota	July 15, 1870	January 22, 1871	191 days	Successor qualified[1]
					March 4, 1871	March 7, 1881	10 years, 3 days	Resigned to become United States Secretary of the Treasury[1]
					March 7, 1889	January 29, 1891	1 year, 328 days	Lost re-election[1]
	Arthur Capper		Republican	Kansas	March 4, 1919	January 3, 1949	29 years, 305 days	Retired[1]
	Joseph R. Grundy		Republican	Pennsylvania	December 11, 1929	December 1, 1930	355 days	Lost re-election[1]
	Paul Douglas		Democratic	Illinois	January 3, 1949	January 3, 1967	18 years, 0 days	Lost re-election[2]
	Richard Nixon		Republican	California	December 1, 1950	January 1, 1953	2 years, 31 days	Resigned, having been elected vice president of the United States[3]
	John Hickenlooper		Democratic	Colorado	January 3, 2021	Incumbent	4 years, 11 days	[4]

Senator		Party		District	Term			Notes
					Start	End	Length of service (days)
	John Chew Thomas		Federalist	MD-02	March 4, 1799	March 1, 1801	1 year, 362 days	Retired[1]
	John Conard		Democratic- Republican	PA-01	March 8, 1813	March 8, 1815	2 years, 0 days	Retired[1]
	William Darlington		Democratic- Republican	PA-02	March 4, 1815	March 3, 1817	1 year, 364 days	[1]
					March 4, 1819	March 3, 1823	3 years, 364 days	[1]
	Edward Bates		National Republican Party	MO-AL	March 4, 1827	March 3, 1829	1 year, 364 days	[1]
	John Wethered		Whig	MD-03	April 8, 1843	March 8, 1845	1 year, 334 days	[1]
	Joseph Grinnell		Whig	MA-10	December 7, 1843	March 8, 1851	7 years, 91 days	Retired[1]
	Samuel G. Wright		Whig	NJ-02	March 4, 1845	July 30, 1845	148 days	Died in office[1]
	David P. Holloway		Opposition	IN-05	January 4, 1855	January 3, 1857	1 year, 365 days	[1]
	William Windom		Republican	MN-01	January 4, 1863	January 4, 1869	6 years, 0 days	Retired[1]
	Isaac Ambrose Barber		Republican	MD-01	January 4, 1897	January 3, 1899	1 year, 364 days	[1]
	Thomas S. Butler		Republican	PA-06	March 8, 1897	March 8, 1903	31 years, 79 days	Died in office[5]
				PA-07	March 8, 1903	March 8, 1923
				PA-08	March 8, 1923	May 26, 1928
	William W. Cocks		Republican	NY-01	March 4, 1905	March 3, 1911	5 years, 364 days	[1]
	A. Mitchell Palmer		Democratic	PA-26	March 4, 1909	March 3, 1915	5 years, 364 days	Retired to unsuccessfully run for the Senate[1]
	Frederick C. Hicks		Republican	NY-01	January 4, 1916	March 3, 1923	6 years, 364 days	[1]
	Andrew Biemiller		Democratic	WI-05	January 3, 1945	January 3, 1947	2 years, 0 days	Lost re-election[1]
					January 3, 1949	January 3, 1951	2 years, 0 days	Lost re-election[1]
	Richard Nixon		Republican	CA-12	January 3, 1947	November 30, 1950	3 years, 331 days	Resigned on appointment to the Senate[3]
	Edward Tylor Miller		Republican	MD-01	January 3, 1947	January 3, 1959	12 years, 0 days	Lost re-election[1]
	William G. Bray		Republican	IN-07	January 3, 1951	January 3, 1967	16 years, 0 days	Lost re-election[1]
				IN-06	January 3, 1967	January 3, 1975
	Edwin B. Forsythe		Republican	NJ-06	November 3, 1970	January 3, 1983	13 years, 147 days	Died in office[1]
				NJ-13	January 3, 1983	March 29, 1984
	Rush Holt Jr.		Democratic	NJ-12	January 3, 1999	January 3, 2015	16 years, 0 days	Retired[6]

• List of Buddhist members of the United States Congress
• List of Hindu members of the United States Congress
• List of Jewish members of the United States Congress
• List of Mormon members of the United States Congress
• List of Muslim members of the United States Congress