Iowa's congressional delegations

Since Iowa became a U.S. state in 1846, it has sent congressional delegations to the United States Senate and United States House of Representatives. Each state elects two senators to serve for six years, and members of the House to two-year terms. Before becoming a state, the Iowa Territory elected a non-voting delegate at-large to Congress from 1838 to 1846.
These are tables of congressional delegations from Iowa to the United States Senate and the United States House of Representatives.

Current delegation

Iowa's current congressional delegation in the consists of its two senators and four representatives, all Republicans.
The current dean of the Iowa delegation is Senator and President pro tempore of the United States Senate Chuck Grassley, having served in the Senate since 1981 and in Congress since 1975.

United States Senate

United States House of Representatives

1838–1846: 1 non-voting delegate

On July 4, 1838, the Iowa Territory was organized. Most of the area comprising the territory was originally part of the Louisiana Purchase and was a part of the Missouri Territory. When Missouri became a state in 1821, this area effectively became unorganized territory. The area was closed to white settlers until the 1830s, after the Black Hawk War ended. It was attached to the Michigan Territory on June 28, 1834, and was split off with the Wisconsin Territory in 1836 when Michigan became a state. The Iowa Territory was the "Iowa District" of western Wisconsin Territory – the region west of the Mississippi River. The original boundaries of the territory, as established in 1838, included part of Minnesota and parts of the Dakotas, covering about of land.
Starting on September 10, 1838, Iowa Territory sent a non-voting delegate to the House.

Years	Delegate from
September 10, 1838 – October 27, 1840	William W. Chapman
October 28, 1840 – December 28, 1846	Augustus C. Dodge

1846–1863: 2 seats

Following statehood on December 28, 1846, Iowa had two seats in the House. It elected both seats statewide at-large on a general ticket, until 1847, when it redistricted into two districts.

1863–1873: 6 seats

Following the 1860 census, Iowa was apportioned 6 seats.

Congress
38th	James F. Wilson	Hiram Price	William B. Allison	Josiah B. Grinnell	John A. Kasson	Asahel W. Hubbard
39th	James F. Wilson	Hiram Price	William B. Allison	Josiah B. Grinnell	John A. Kasson	Asahel W. Hubbard
40th	James F. Wilson	Hiram Price	William B. Allison	William Loughridge	Grenville M. Dodge	Asahel W. Hubbard
41st	George W. McCrary	William Smyth	William B. Allison	William Loughridge	Francis W. Palmer	Charles Pomeroy
41st	George W. McCrary	William P. Wolf	William B. Allison	William Loughridge	Francis W. Palmer	Charles Pomeroy
42nd	George W. McCrary	Aylett R. Cotton	William G. Donnan	Madison M. Walden	Francis W. Palmer	Jackson Orr

1873–1883: 9 seats

Following the 1870 census, Iowa was apportioned 9 seats.

Congress
43rd	George W. McCrary	Aylett R. Cotton	William G. Donnan	Henry Otis Pratt	James Wilson	William Loughridge	John A. Kasson	James W. McDill	Jackson Orr
44th	George W. McCrary	John Q. Tufts	L. L. Ainsworth	Henry Otis Pratt	James Wilson	Ezekiel S. Sampson	John A. Kasson	James W. McDill	S. Addison Oliver
45th	Joseph Champlin Stone	Hiram Price	Theodore Weld Burdick	Nathaniel Cobb Deering	Rush Clark	Ezekiel S. Sampson	Henry J. B. Cummings	William Fletcher Sapp	S. Addison Oliver
46th	Moses A. McCoid	Hiram Price	Thomas Updegraff	Nathaniel Cobb Deering	Rush Clark	James B. Weaver	Edward H. Gillette	William Fletcher Sapp	Cyrus C. Carpenter
46th	Moses A. McCoid	Hiram Price	Thomas Updegraff	Nathaniel Cobb Deering	William George Thompson	James B. Weaver	Edward H. Gillette	William Fletcher Sapp	Cyrus C. Carpenter
47th	Moses A. McCoid	Sewall S. Farwell	Thomas Updegraff	Nathaniel Cobb Deering	William George Thompson	Marsena E. Cutts	John A. Kasson	William P. Hepburn	Cyrus C. Carpenter
47th	Moses A. McCoid	Sewall S. Farwell	Thomas Updegraff	Nathaniel Cobb Deering	William George Thompson	John C. Cook	John A. Kasson	William P. Hepburn	Cyrus C. Carpenter

1883–1933: 11 seats

Following the 1880 census, Iowa was apportioned 11 seats.

1933–1943: 9 seats

Following the 1930 census, Iowa was apportioned 9 seats.

1943–1963: 8 seats

Following the 1940 census, Iowa was apportioned 8 seats.

1963–1973: 7 seats

Following the 1960 census, Iowa was apportioned 7 seats.

1973–1993: 6 seats

Following the 1970 census, Iowa was apportioned 6 seats.

Congress
93rd	Edward Mezvinsky	John Culver	H. R. Gross	Neal Smith	William Scherle	Wiley Mayne
94th	Edward Mezvinsky	Mike Blouin	Chuck Grassley	Neal Smith	Tom Harkin	Berkley Bedell
95th	Jim Leach	Mike Blouin	Chuck Grassley	Neal Smith	Tom Harkin	Berkley Bedell
96th	Jim Leach	Tom Tauke	Chuck Grassley	Neal Smith	Tom Harkin	Berkley Bedell
97th	Jim Leach	Tom Tauke	T. Cooper Evans	Neal Smith	Tom Harkin	Berkley Bedell
98th	Jim Leach	Tom Tauke	T. Cooper Evans	Neal Smith	Tom Harkin	Berkley Bedell
99th	Jim Leach	Tom Tauke	T. Cooper Evans	Neal Smith	Jim Ross Lightfoot	Berkley Bedell
100th	Jim Leach	Tom Tauke	Dave Nagle	Neal Smith	Jim Ross Lightfoot	Fred Grandy
101st	Jim Leach	Tom Tauke	Dave Nagle	Neal Smith	Jim Ross Lightfoot	Fred Grandy
102nd	Jim Leach	Jim Nussle	Dave Nagle	Neal Smith	Jim Ross Lightfoot	Fred Grandy

1993–2013: 5 seats

Following the 1990 census, Iowa was apportioned 5 seats.

Congress
103rd	Jim Leach	Jim Nussle	Jim Ross Lightfoot	Neal Smith	Fred Grandy
104th	Jim Leach	Jim Nussle	Jim Ross Lightfoot	Greg Ganske	Tom Latham
105th	Jim Leach	Jim Nussle	Leonard Boswell	Greg Ganske	Tom Latham
106th	Jim Leach	Jim Nussle	Leonard Boswell	Greg Ganske	Tom Latham
107th	Jim Leach	Jim Nussle	Leonard Boswell	Greg Ganske	Tom Latham
108th	Jim Nussle	Jim Leach	Leonard Boswell	Tom Latham	Steve King
109th	Jim Nussle	Jim Leach	Leonard Boswell	Tom Latham	Steve King
110th	Bruce Braley	Dave Loebsack	Leonard Boswell	Tom Latham	Steve King
111th	Bruce Braley	Dave Loebsack	Leonard Boswell	Tom Latham	Steve King
112th	Bruce Braley	Dave Loebsack	Leonard Boswell	Tom Latham	Steve King

2013–present: 4 seats

Following the 2010 census, Iowa was apportioned 4 seats.

Congress
113th	Bruce Braley	Dave Loebsack	Tom Latham	Steve King
114th	Rod Blum	Dave Loebsack	David Young	Steve King
115th	Rod Blum	Dave Loebsack	David Young	Steve King
116th	Abby Finkenauer	Dave Loebsack	Cindy Axne	Steve King
117th	Ashley Hinson	Mariannette Miller-Meeks	Cindy Axne	Randy Feenstra
118th	Mariannette Miller-Meeks	Ashley Hinson	Zach Nunn	Randy Feenstra
	Mariannette Miller-Meeks	Ashley Hinson	Zach Nunn	Randy Feenstra