IA-04 elected a Republican in 2024.

R+34.3 on 373,824 certified votes. Below: the 2024 result and this district's margin across every cycle on record.

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IA-04 — 2024 result

Source: MIT Election Data + Science Lab, US House returns (party-classified by literal ballot party).

Democratic (D)

122,175

32.7%

Republican (R)

250,522

67.0%

All others

1,127

0.3%

Margin

R+34.3

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Margin history

IA-04 across every cycle on record. Each year links to its district page.

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Year	Won	Margin	Votes
2024	R	−34.3%	373,824
2022	R	−36.9%	277,008
2020	R	−24.2%	383,022
2018	R	−3.3%	313,251
2016	R	−22.6%	370,259
2014	R	−23.3%	275,633
2012	R	−8.1%	377,883
2010	R	−33.7%	232,519
2008	R	−21.1%	306,204
2006	R	−14.4%	212,632
2004	R	−21.9%	297,566
2002	R	−11.7%	210,774
2000	R	−24.7%	275,645
1998	R	−31.3%	199,277
1996	R	−5.3%	256,509
1994	R	−6.1%	213,206
1992	D	+25.1%	257,441
1990	D	+97.9%	130,590
1988	D	+43.3%	219,223
1986	D	+36.7%	156,952
1984	D	+21.4%	225,639
1982	D	+32.4%	179,972
1980	D	+8.0%	218,620
1978	D	+29.4%	136,834
1976	D	+38.2%	210,356