These are tables of congressional delegations from Iowa to the United States Senate and United States House of Representatives.

United States Senate

Class 2 Senators	Congress	Class 3 Senators
George W. Jones (D)	30th (1847-1849)	Augustus C. Dodge (D)
	31st (1849-1851)
	32nd (1851-1853)
	33rd (1853-1855)
	34th (1855-1857)	James Harlan (R)
	35th (1857-1859)
James W. Grimes (R)	36th (1859-1861)
	37th (1861-1863)
	38th (1863-1865)
	39th (1865-1867)
		Samuel J. Kirkwood (R)
	40th (1867-1869)	James Harlan (R)
	41st (1869-1871)
James B. Howell (R)
George G. Wright (R)	42nd (1871-1873)
	43rd (1873-1875)	William B. Allison (R)
	44th (1875-1877)
Samuel J. Kirkwood (R)	45th (1877-1879)
	46th (1879-1881)
	47th (1881-1883)
James W. McDill (R)
James F. Wilson (R)	48th (1883-1885)
	49th (1885-1887)
	50th (1887-1889)
	51st (1889-1891)
	52nd (1891-1893)
	53rd (1893-1895)
John H. Gear (R)	54th (1895-1897)
	55th (1897-1899)
	56th (1899-1901)
Jonathan P. Dolliver (R)
	57th (1901-1903)
	58th (1903-1905)
	59th (1905-1907)
	60th (1907-1909)
		Albert B. Cummins (R)
	61st (1909-1911)
Lafayette Young (R)
	62nd (1911-1913)
William S. Kenyon (R)
	63rd (1913-1915)
	64th (1915-1917)
	65th (1917-1919)
	66th (1919-1921)
	67th (1921-1923)
Charles A. Rawson (R)
Smith W. Brookhart (R)
	68th (1923-1925)
	69th (1925-1927)
Daniel F. Steck (D)		David W. Stewart (R)
	70th (1927-1929)	Smith W. Brookhart (R)
	71st (1929-1931)
L. J. Dickinson (R)	72nd (1931-1933)
	73rd (1933-1935)	Richard Louis Murphy (D)
	74th (1935-1937)
		Guy M. Gillette (D)
Clyde L. Herring (D)	75th (1937-1939)
	76th (1939-1941)
	77th (1941-1943)
George A. Wilson (R)	78th (1943-1945)
	79th (1945-1947)	Bourke B. Hickenlooper (R)
	80th (1947-1949)
Guy M. Gillette (D)	81st (1949-1951)
	82nd (1951-1953)
	83rd (1953-1955)
Thomas E. Martin (R)	84th (1955-1957)
	85th (1957-1959)
	86th (1959-1961)
Jack R. Miller (R)	87th (1961-1963)
	88th (1963-1965)
	89th (1965-1967)
	90th (1967-1969)
	91st (1969-1971)	Harold E. Hughes (D)
	92nd (1971-1973)
Richard C. Clark (D)	93rd (1973-1975)
	94th (1975-1977)	John C. Culver (D)
	95th (1977-1979)
Roger W. Jepsen (R)	96th (1979-1981)
	97th (1981-1983)	Charles Grassley (R)
	98th (1983-1985)
Tom Harkin (D)	99th (1985-1987)
	100th (1987-1989)
	101st (1989-1991)
	102nd (1991-1993)
	103rd (1993-1995)
	104th (1995-1997)
	105th (1997-1999)
	106th (1999-2001)
	107th (2001-2003)
	108th (2003-2005)
	109th (2005-2007)

United States House of Representatives

Congress	District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th
73rd	Edward C. Eicher	Bernhard M. Jacobsen	Albert C. Willford	Fred Biermann	Lloyd Thurston	Cassius C. Dowell	Otha D. Wearin	Fred C. Gilchrist	Guy M. Gillette
74th			John W. Gwynne			Hubert Utterback
75th		William S. Jacobsen				Cassius C. Dowell			Vincent F. Harrington
76th	Thomas E. Martin			Henry O. Talle	Karl M. LeCompte		Ben F. Jensen
77th						Paul Cunningham
78th		Henry O. Talle		Karl M. LeCompte	Paul Cunningham	Fred C. Gilchrist		Charles B. Hoeven
79th						James I. Dolliver
80th
81st			H.R. Gross
82nd
83rd
84th	Fred Schwengel
85th						Merwin Coad
86th		Leonard G. Wolf		Steven V. Carter	Neal Smith
87th		James E. Bromwell		John Kyl
88th						Charles B. Hoeven
89th	John R. Schmidhauser	John C. Culver		Bert Bandstra		Stanley L. Greigg	John R. Hansen
90th	Fred Schwengel			John Kyl		Wiley Mayne	William J. Scherle
91st
92nd
93rd	Edward Mezvinsky			Neal Smith	William J. Scherle
94th		Michael T. Blouin	Charles E. Grassley		Tom Harkin	Berkley Bedell
95th	Jim Leach
96th		Tom Tauke
97th			T. Cooper Evans
98th
99th					Jim Ross Lightfoot
100th			David R. Nagle			Fred Grandy
101st
102nd		Jim Nussle
103rd			Jim Ross Lightfoot		Fred Grandy
104th				Greg Ganske	Tom Latham
105th			Leonard L. Boswell
106th
107th
108th	Jim Nussle	Jim Leach		Tom Latham	Steve King
109th