CA-01 elected a Republican in 2024.

R+30.7 on 319,228 certified votes. Below: the 2024 result and this district's margin across every cycle on record.

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CA-01 — 2024 result

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

Democratic (D)

110,636

34.7%

Republican (R)

208,592

65.3%

All others

0

0.0%

Margin

R+30.7

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Margin history

CA-01 across every cycle on record. Each year links to its district page.

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Year	Won	Margin	Votes
2024	R	−30.7%	319,228
2022	R	−24.1%	246,225
2020	R	−14.0%	358,263
2018	R	−9.8%	291,594
2016	R	−18.1%	314,036
2014	R	−22.1%	216,372
2012	R	−14.8%	294,213
2010	D	+31.8%	234,592
2008	D	+44.7%	290,472
2006	D	+37.2%	218,044
2004	D	+38.7%	282,971
2002	D	+31.7%	185,216
2000	D	+37.0%	239,335
1998	D	+29.0%	196,805
1996	R	−6.2%	222,119
1994	R	−6.6%	200,673
1992	D	+2.6%	251,206
1990	R	−1.4%	230,261
1988	D	+34.5%	254,154
1986	D	+40.9%	204,759
1984	D	+24.5%	252,223
1982	D	+2.6%	216,166
1980	R	−13.8%	270,199
1978	D	+18.7%	210,812
1976	D	+47.9%	217,016