2018 United States Senate election in California

The **2018 United States Senate election in California** took place on November 6, 2018. Incumbent Democrat Dianne Feinstein and Democrat Kevin de León won the primary election, so they were both featured in the general election.

Dianne Feinstein won the election.

## Primary election

|colspan=5|Primary results|||||||
| --- | --- | --- | --- | --- | --- | --- | --- |
|bgcolor= #3333FF width=1||**Democratic**|**Dianne Feinstein**|align=right|**2,947,035**|align=right|**44.2**|
|bgcolor= #3333FF width=1||**Democratic**|**Kevin de León**|align=right|**805,446**|align=right|**12.1**|
|bgcolor= #E81B23 width=1||Republican|James P. Bradley|align=right|556,252|align=right|8.3|
|bgcolor= #E81B23 width=1||Republican|Arun K. Bhumitra|align=right|350,815|align=right|5.3|
|bgcolor= #E81B23 width=1||Republican|Paul A. Taylor|align=right|323,533|align=right|4.9|
|bgcolor= #E81B23 width=1||Republican|Erin Cruz|align=right|267,494|align=right|4.0|
|bgcolor= #E81B23 width=1||Republican|Tom Palzer|align=right|205,183|align=right|3.1|
|bgcolor= #3333FF width=1||Democratic|Alison Hartson|align=right|147,061|align=right|2.2|
|bgcolor= #E81B23 width=1||Republican|Rocky De La Fuente|align=right|135,278|align=right|2.0|
|bgcolor= #3333FF width=1||Democratic|Pat Harris|align=right|126,947|align=right|1.9|
|bgcolor= #E81B23 width=1||Republican|John "Jack" Crew|align=right|93,806|align=right|1.4|
|bgcolor= #E81B23 width=1||Republican|Patrick Little|align=right|89,867|align=right|1.3|
|bgcolor= #E81B23 width=1||Republican|Kevin Mottus|align=right|87,646|align=right|1.3|
|bgcolor= #E81B23 width=1||Republican|Jerry Joseph Laws|align=right|67,140|align=right|1.0|
|bgcolor= #E2E2E2 width=1||colspan=2|Others|align=right|467,217|align=right|7.0|

## General election

|colspan=5|General election results|||||||
| --- | --- | --- | --- | --- | --- | --- | --- |
|bgcolor= #3333FF width=1||**Democratic**|**Dianne Feinstein**|align=right|**6,019,422**|align=right|**54.2**|
|bgcolor= #3333FF width=1||Democratic|Kevin de León|align=right|5,093,942|align=right|45.8|

### Results by county

<span style="background:#AEC6EA>Blue</span> represents counties won by Feinstein. <span style="background:#91E191>Green</span> represents counties won by de León.

|County|Feinstein#|Feinstein%|| de León% || Total|||
| --- | --- | --- | --- | --- | --- |
|Alameda|**318,377**|**58.4**|226,950|41.6|545,327|
|Alpine|267|48.8|**280**|**51.2**|547|
|Amador|5,835|41.4|**8,244**|**58.6**|14,079|
|Butte|32,418|42.9|**43,108**|**57.1**|75,526|
|Calaveras|7,031|40.4|**10,357**|**59.6**|17,388|
|Colusa|1,643|35.1|**3,039**|**64.9**|4,682|
|Contra Costa|**222,349**|**58.3**|158,748|41.7|381,097|
|Del Norte|2,590|37.8|**4,254**|**62.2**|6,844|
|El Dorado|33,772|46.5|**38,791**|**53.5**|72,563|
|Fresno|103,491|47.7|**113,557**|**52.3**|217,048|
|Glenn|2,341|34.8|**4,388**|**65.2**|6,729|
|Humboldt|21,336|44.8|**26,319**|**55.2**|47,655|
|Imperial|13,121|43.3|**17,150**|**56.7**|30,271|
|Inyo|2,344|39.9|**3,532**|**60.1**|5,876|
|Kern|66,628|40.0|**99,981**|**60.0**|166,609|
|Kings|9,599|37.9|**15,748**|**62.1**|25,347|
|Lake|8,142|44.1|**10,317**|**55.9**|18,459|
|Lassen|2,030|29.8|**4,788**|**70.2**|6,818|
|Los Angeles|**1,565,167**|**57.7**|1,146,044|42.3|2,711,211|
|Madera|13,284|41.1|**19,032**|**58.9**|32,316|
|Marin|**80,319**|**65.3**|42,638|34.7|122,957|
|Mariposa|2,749|41.1|**3,939**|**58.9**|6,688|
|Mendocino|15,113|49.3|**15,529**|**50.7**|30,642|
|Merced|23,659|45.8|**27,985**|**54.2**|51,644|
|Modoc|751|28.7|**1,867**|**71.3**|2,618|
|Mono|2,001|47.7|**2,197**|**52.3**|4,198|
|Monterey|**56,320**|**52.7**|50,562|47.3|106,882|
|Napa|**27,904**|**54.5**|23,290|45.5|51,194|
|Nevada|22,198|48.1|**23,911**|**51.9**|46,109|
|Orange|**501,678**|**54.4**|420,814|45.6|922,492|
|Placer|66,578|46.5|**76,733**|**53.5**|143,311|
|Plumas|2,815|38.9|**4,428**|**61.1**|7,243|
|Riverside|269,567|49.2|**278,409**|**50.8**|547,976|
|Sacramento|**241,571**|**53.0**|213,949|47.0|455,520|
|San Benito|8,607|47.9|**9,371**|**52.1**|17,978|
|San Bernardino|233,103|50.0|**233,360**|**50.0**|466,463|
|San Diego|**526,628**|**52.9**|468,564|47.1|995,192|
|San Francisco|**226,167**|**64.2**|125,954|35.8|352,121|
|San Joaquin|79,088|46.1|**92,351**|**53.9**|171,439|
|San Luis Obispo|53,242|49.6|**54,027**|**50.4**|107,269|
|San Mateo|**168,679**|**63.0**|99,136|37.0|267,815|
|Santa Barbara|**75,274**|**55.1**|61,217|44.9|136,491|
|Santa Clara|**339,866**|**59.8**|228,642|40.2|568,508|
|Santa Cruz|**64,178**|**57.5**|47,416|42.5|111,594|
|Shasta|19,397|34.9|**36,227**|**65.1**|55,624|
|Sierra|506|38.5|**808**|**61.5**|1,314|
|Siskiyou|5,772|39.3|**8,930**|**60.7**|14,702|
|Solano|**70,174**|**52.9**|62,506|47.1|132,680|
|Sonoma|**108,472**|**56.0**|85,220|44.0|193,692|
|Stanislaus|58,375|42.9|**77,724**|**57.1**|136,099|
|Sutter|10,501|42.6|**14,166**|**57.4**|24,667|
|Tehama|5,435|32.6|**11,253**|**67.4**|16,688|
|Trinity|1,746|38.1|**2,838**|**61.9**|4,584|
|Tulare|33,005|39.9|**49,765**|**60.1**|82,770|
|Tuolumne|7,783|40.8|**11,271**|**59.2**|19,054|
|Ventura|**137,141**|**51.3**|130,101|48.7|267,242|
|Yolo|**35,071**|**51.9**|32,551|48.1|67,622|
|Yuba|6,224|39.2|**9,666**|**60.8**|15,890|

## Infobox (election)

- **election name**: 2018 United States Senate election in California
- **country**: California
- **type**: presidential
- **ongoing**: no
- **previous election**: 2012 United States Senate election in California
- **previous year**: 2012
- **next election**: 2024 United States Senate election in California
- **next year**: 2024
- **election date**: November 6, 2018
- **turnout**: 56.42%
- **image1**:
- **candidate1**: **Dianne Feinstein**
- **party1**: Democratic Party (United States)
- **popular vote1**: **6,019,422**
- **percentage1**: **54.2%**
- **image2**:
- **candidate2**: Kevin de León
- **party2**: Democratic Party (United States)
- **popular vote2**: 5,093,942
- **percentage2**: 45.8%
- **map image**: 2018 United States Senate election in California results map by county.svg
- **map size**: 240px
- **map caption**: County Results
**Feinstein:**

**de León:**
- **title**: U.S. Senator
- **before election**: Dianne Feinstein
- **before party**: Democratic Party (United States)
- **after election**: Dianne Feinstein
- **after party**: Democratic Party (United States)