Acalanes Ridge
Unincorporated Community
Census Designated Place
CountryUnited States
StateCalifornia
CountyContra Costa
Population total1285
Population as of2020
Population density1076.60 km²
Unit prefImperial
Area total0.46 sq mi
Area land0.46 sq mi
Area water0.00 sq mi
Area total1.19 km²
Area land1.19 km²
Area water0.00 km²
Area water percent0
Time zonePacific (PST) (UTC-8)
Time zone (DST)PDT (UTC-7)
Elevation750 ft
Coordinates37°54′17″N 122°04′43″W
Population density2787.42 sq mi

Acalanes Ridge is a census-designated place[1] in Contra Costa County, California. Acalanes Ridge sits at an elevation of 499 feet (152 m).[1] The population was 1,285 at the 2020 Census.

Acalanes Ridge was created a census-designated place for the 2010 census, and comes alphabetically first among all census-designated places in California.[2]

History

Acalanes Ridge is named after the area's historical Native American residents, the Sacalanes.[3]

Demographics

Acalanes Ridge first appeared as a census designated place in the 2010 U.S. census formed from part of Walnut Creek city and additional area.[4]

Racial and ethnic composition

Acalanes Ridge CDP, California – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
Race / Ethnicity (NH = Non-Hispanic)Pop 2010[5]Pop 2020[6]% 2010% 2020
White alone (NH)908style='background: #ffffe6; |91879.86%style='background: #ffffe6; |71.44%
Black or African American alone (NH)5style='background: #ffffe6; |90.44%style='background: #ffffe6; |0.70%
Native American or Alaska Native alone (NH)6style='background: #ffffe6; |10.53%style='background: #ffffe6; |0.08%
Asian alone (NH)125style='background: #ffffe6; |17510.99%style='background: #ffffe6; |13.62%
Native Hawaiian or Pacific Islander alone (NH)2style='background: #ffffe6; |00.18%style='background: #ffffe6; |0.00%
Other race alone (NH)5style='background: #ffffe6; |80.44%style='background: #ffffe6; |0.62%
Mixed race or Multiracial (NH)36style='background: #ffffe6; |673.17%style='background: #ffffe6; |5.21%
Hispanic or Latino (any race)50style='background: #ffffe6; |1074.40%style='background: #ffffe6; |8.33%
Total1,137style='background: #ffffe6; |1,285 100.00%style='background: #ffffe6; |100.00%

2020 census

As of the 2020 census, Acalanes Ridge had a population of 1,285, with a population density of 2,787.4 inhabitants per square mile (1,076.2 /km2).[7][8]

100.0% of residents lived in urban areas and 0.0% lived in rural areas. The Census also reported that 100% of the population lived in households.[9][10]

There were 475 households, out of which 34.7% included children under the age of 18, 66.3% were married-couple households, 3.2% were cohabiting couple households, 17.7% had a female householder with no spouse or partner present, and 12.8% had a male householder with no spouse or partner present. Of all households, 18.5% were one person households, and 9.7% were one person aged 65 or older. The average household size was 2.71, and there were 376 families (79.2% of all households).[8][11]

The age distribution was 20.9% under the age of 18, 6.7% aged 18 to 24, 18.7% aged 25 to 44, 30.0% aged 45 to 64, and 23.7% aged 65 or older. The median age was 47.6 years. For every 100 females, there were 99.5 males; for every 100 females age 18 and over, there were 97.5 males age 18 and over.[8]

There were 487 housing units at an average density of 1,056.4 /mi2. Of these, 475 (97.5%) were occupied and 2.5% were vacant. Of occupied units, 86.7% were owner-occupied and 13.3% were occupied by renters. The homeowner vacancy rate was 0.2% and the rental vacancy rate was 7.2%.[8][7]

Education

Most of Acalanes Ridge is in the Walnut Creek Elementary School District while some is in the Lafayette Elementary School District. All of Acalanes Ridge is in the Acalanes Union High School District.[12]

References

  1. ^
  2. ^ "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved November 8, 2021.
  3. ^ Erwin G. Gudde & William Bright (May 10, 2004). California Place Names: The Origin and Etymology of Current Geographical Names. University of California Press. p. 3. ISBN 978-0-520-24217-3. Retrieved January 20, 2012.
  4. ^ "2010 Census Interactive Population Search: CA - Acalanes Ridge CDP". U.S. Census Bureau. Archived from the original on July 14, 2014. Retrieved July 12, 2014.
  5. ^ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Acalanes Ridge CDP, California". United States Census Bureau
  6. ^ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Acalanes Ridge CDP, California". United States Census Bureau
  7. ^ "2020 Decennial Census Redistricting Data (Public Law 94-171)". United States Census Bureau. 2021. Retrieved April 30, 2026.
  8. ^ "2020 Decennial Census Demographic Profile (DP1)". United States Census Bureau. 2021. Retrieved April 30, 2026.
  9. ^ "2020 Decennial Census Demographic and Housing Characteristics (DHC)". United States Census Bureau. 2023. Retrieved April 30, 2026.
  10. ^ "Acalanes Ridge CDP, California; DP1: Profile of General Population and Housing Characteristics - 2020 Census of Population and Housing". US Census Bureau. Retrieved March 26, 2025.
  11. ^ "Acalanes Ridge CDP, California; P16: Household Type - 2020 Census of Population and Housing". US Census Bureau. Retrieved March 26, 2025.
  12. ^ "2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Contra Costa County, CA". U.S. Census Bureau. Retrieved December 25, 2022.