Diablo, California

Census-designated place in California, United States

Diablo

Census-designated place

Location in Contra Costa County and the state of California

Diablo

Location in the United States

Coordinates: 37°50′06″N 121°57′29″W﻿ / ﻿37.83500°N 121.95806°W﻿ / 37.83500; -121.95806
Country|  United States
State|  California
County| Contra Costa
Government

• State Senate| Jesse Arreguín (D)[1]
• State Assembly| Rebecca Bauer-Kahan (D)[2]
• U. S. Congress| Mark DeSaulnier (D)[3]
Area

[4]

• Total

| 1.36 sq mi (3.53 km2)
• Land| 1.36 sq mi (3.53 km2)
• Water| 0.00 sq mi (0.00 km2)  0%
Elevation

[5]

| 528 ft (161 m)
Population

(2020)

• Total

| 1,255
• Density| 920.09/sq mi (355.33/km2)
Time zone| UTC-8 (PST)
• Summer (DST)| UTC-7 (PDT)
ZIP code|

94528

Area code| 925
FIPS code| 06-19150
GNIS feature IDs| 1655967, 2408668

Diablo (Spanish for "Devil") is a census-designated place (CDP) in Contra Costa County, California, United States. The population was 1,158 at the 2010 census. It is located 2.5 miles (4.0 km) east-northeast of Danville.[6]

## Geography

[edit]

According to the United States Census Bureau, the CDP has a total area of 1.4 square miles (3.6 km2), all of it land.

## History

[edit]

A post office was established at Diablo in 1916.[6]

## Demographics

[edit]

Historical population Census| Pop.| Note| %±

|
|
|

2000| 988| | —
2010| 1,158| | 17.2%
2020| 1,255| | 8.4%
U.S. Decennial Census[7]

The 2020 United States census reported that Diablo had a population of 1,255. The population density was 920.1 inhabitants per square mile (355.3/km2). The racial makeup of Diablo was 81.1% White, 0.6% African American, 0.4% Native American, 8.0% Asian, 0.0% Pacific Islander, 0.6% from other races, and 9.3% from two or more races. Hispanic or Latino of any race were 6.4% of the population.

The census reported that 95.1% of the population lived in households, 4.9% lived in non-institutionalized group quarters, and no one was institutionalized.

There were 424 households, out of which 32.1% included children under the age of 18, 77.1% were married-couple households, 1.9% were cohabiting couple households, 13.2% had a female householder with no partner present, and 7.8% had a male householder with no partner present. 13.0% of households were one person, and 7.1% were one person aged 65 or older. The average household size was 2.81. There were 362 families (85.4% of all households).

The age distribution was 21.4% under the age of 18, 6.7% aged 18 to 24, 15.5% aged 25 to 44, 35.9% aged 45 to 64, and 20.6% who were 65 years of age or older. The median age was 49.8 years. For every 100 females, there were 103.7 males.

There were 455 housing units at an average density of 333.6 units per square mile (128.8 units/km2), of which 424 (93.2%) were occupied. Of these, 93.9% were owner-occupied, and 6.1% were occupied by renters.[8][9]

* v
* t
* e

Places adjacent to Diablo, California

| Danville, Alamo | Mount Diablo State Park | Mount Diablo State Park

|
|

|  |
Danville |

Diablo

| Blackhawk
|  |
Danville | Danville | Blackhawk, San Ramon

## Education

[edit]

The school district is San Ramon Valley Unified School District.[10]

## See also

[edit]

* Mount Diablo

## References

[edit]

1. ^ "Senators". State of California. Retrieved March 29, 2013.
2. ^ "Members Assembly". State of California. Retrieved March 29, 2013.
3. ^ "California's 10th Congressional District - Representatives & District Map". Civic Impulse, LLC. Retrieved October 13, 2024.
4. ^ "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved October 30, 2021.
5. ^ "Diablo". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
6. ^ a b Durham, David L. (1998). California's Geographic Names: A Gazetteer of Historic and Modern Names of the State. Clovis, California: Word Dancer Press. p. 624\. ISBN 1-884995-14-4.
7. ^ "Census of Population and Housing". Census.gov. Retrieved June 4, 2016.
8. ^ "Diablo CDP, California; DP1: Profile of General Population and Housing Characteristics - 2020 Census of Population and Housing". US Census Bureau. Retrieved March 27, 2025.
9. ^ "Diablo CDP, California; P16: Household Type - 2020 Census of Population and Housing". US Census Bureau. Retrieved March 27, 2025.
10. ^ 2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Contra Costa County, CA (PDF) (Map). Suitland, Maryland: U.S. Census Bureau. Retrieved January 24, 2025. \- Text list

* "Diablo". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.

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Municipalities and communities of Contra Costa County, California, United States

County seat: Martinez

Cities and towns|

* Antioch
* Brentwood
* Clayton
* Concord
* Danville
* El Cerrito
* Hercules
* Lafayette
* Martinez
* Moraga
* Oakley
* Orinda
* Pinole
* Pittsburg
* Pleasant Hill
* Richmond
* San Pablo
* San Ramon
* Walnut Creek

Contra Costa County map

CDPs|

* Acalanes Ridge
* Alamo
* Alhambra Valley
* Bay Point
* Bayview
* Bethel Island
* Blackhawk
* Byron
* Camino Tassajara
* Castle Hill
* Clyde
* Contra Costa Centre
* Crockett
* Diablo
* Discovery Bay
* East Richmond Heights
* El Sobrante
* Kensington
* Knightsen
* Montalvin Manor
* Mountain View
* Norris Canyon
* North Gate
* North Richmond
* Pacheco
* Port Costa
* Reliez Valley
* Rodeo
* Rollingwood
* San Miguel
* Saranap
* Shell Ridge
* Tara Hills
* Vine Hill

Former CDPs|

* Bayview-Montalvin
* Blackhawk-Camino Tassajara
* Waldon

Unincorporated
communities|

* Canyon
* Cornwall
* Nichols
* Oleum
* Rheem
* Selby
* Stege
* Tassajara
* Tormey
* Valona

Ghost towns|

* Eckley
* Giant (Nitro)
* Judsonville
* Nortonville
* Point of Timber
* Port Chicago
* Somersville
* Stewartville
* West Hartley
* Winehaven

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10k–25k|

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Under 10k|

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CDPs
over 10k|

* Alamo
* Alum Rock
* Ashland
* Bay Point
* Castro Valley
* Cherryland
* Discovery Bay
* El Sobrante
* Fairview
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