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Discovery Bay, California


FieldValue
official_nameDiscovery Bay
settlement_typeCensus-designated place
image_skylineDiscovery Bay (7123754953).jpg
imagesize200px
image_captionAerial view of Discovery Bay
image_flagFlag of Discovery Bay, California.gif
image_sealDiscovery bay ca seal.png
image_mapContra_Costa_County_California_Incorporated_and_Unincorporated_areas_Discovery_Bay_Highlighted.svg
mapsize250x200px
map_captionLocation in Contra Costa County and the state of California
pushpin_mapUSA
pushpin_map_captionLocation in the United States
subdivision_typeCountry
subdivision_nameUnited States
subdivision_type1State
subdivision_name1California
subdivision_type2County
subdivision_name2Contra Costa
leader_title1State Senate
leader_name1{{Cite web
urlhttp://senate.ca.gov/senators
titleSenators
access-dateAugust 16, 2025
publisherState of California}}
leader_title2State Assembly
leader_name2{{Cite web
urlhttp://assembly.ca.gov/assemblymembers
titleMembers Assembly
access-dateAugust 16, 2025
publisherState of California}}
leader_title3U. S. Congress
leader_name3
established_date1964
unit_prefImperial
area_footnotes
area_total_sq_mi6.95
area_land_sq_mi5.59
area_water_sq_mi1.36
area_total_km218.00
area_land_km214.48
area_water_km23.51
area_water_percent19.5
elevation_ft7
elevation_footnotes
population_as_of2020
population_total15358
population_density_km21060.47
population_density_sq_mi2746.42
timezonePST
utc_offset−08:00
coordinates
timezone_DSTPDT
utc_offset_DST−07:00
postal_code_typeZIP Code
postal_code94505
area_code925
blank_nameFIPS code
blank_info06-19339
blank1_nameGNIS feature IDs
blank1_info,
websitehttps://www.todb.ca.gov/

|access-date=August 16, 2025 |access-date=August 16, 2025

Discovery Bay is a census-designated place (CDP) in eastern Contra Costa County, California in the United States, about 60 miles (97 km) from San Francisco. It is located in the San Francisco Bay Area. As of 2020, its population was 15,358, a 15% percent gain from 13,352 at the 2010 census.

Discovery Bay was originally a waterfront community built on a network of man-made waterways and residential islands, except for the southeast quadrant, which comprises the golf course of Discovery Bay Country Club. The homes generally have private docks with access to the Sacramento–San Joaquin River Delta. Newer developments have been added on former agricultural land to the north and west of the initial town-site. Road access is via California State Route 4.

History

Discovery Bay began as a planned community in 1964, and originally designated as "Riverside" and "River Lake." It was built on land known as the Byron Tract, which was previously used for growing barley and potatoes. In 1968, Jurgen Lunding led an effort to give the community its current name.

In July 2007, Discovery Bay received its own ZIP code: 94505. Formerly, it had shared 94514 with Byron. The ensuing celebration included a paddle boat raft-up that set a world record.

Geography

According to the United States Census Bureau, the CDP has a total area of 6.9 sqmi, of which 5.6 sqmi of it is land and 1.4 sqmi of it (19.5%) is water.

19 miles of 100-year flood protection levees maintained by Reclamation District 800 provide flood protection for part of the reclaimed swampland beneath Discovery Bay. But most residences (the waterfront properties with San Francisco Bay delta access) are not levee-protected.

Government

Discovery Bay is one of the unincorporated areas in California that has a community services district (CSD), a special district that provides some basic services that are usually provided by the county. The primary duties of the area's community services district, known as The Town of Discovery Bay Community Services District, are handling water, sewer, landscaping and recreation. The CSD Board has five members who are elected by community residents. While the CSD Board has no land use or zoning authority, the CSD can advise the county on decisions related to police and fire services, residential and commercial development, and more.

In December 2016, the CSD Board announced that Discovery Bay resident Mike Davies would become the general manager of CSD, effective January 3, 2017. He would replace the interim manager, Catherine Kutsuris. Davies had served as a police officer in Brentwood, California, including five years as chief of police there. Retiring from Brentwood Police Department in 2006, he was hired at the California Police Officers Standards and Training organization in Sacramento.

Demographics

|align-fn=center 1860–1870 1880-1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 2020

Discovery Bay first appeared as a census designated place in the 1980 United States census.

2020 census

Race / Ethnicity (NH = Non-Hispanic)title=P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Discovery Bay CDP, Californiaurl=https://data.census.gov/table?g=160XX00US0619339&tid=DECENNIALSF12000.P004website=United States Census Bureauaccess-date= }}title=P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Discovery Bay CDP, Californiaurl=https://data.census.gov/cedsci/table?q=p2&g=160XX00US0619339&tid=DECENNIALPL2010.P2website=United States Census Bureauaccess-date= }}Pop 2020% 2000% 2010% 2020
White alone (NH)7,4069,6599,73482.46%72.34%63.38%
Black or African American alone (NH)1575307221.75%3.97%4.70%
Native American or Alaska Native alone (NH)5967360.66%0.50%0.23%
Asian alone (NH)1595098801.77%3.81%5.73%
Native Hawaiian or Pacific Islander alone (NH)1241710.13%0.31%0.46%
Other race alone (NH)1517620.17%0.13%0.40%
Mixed race or Multiracial (NH)2364559882.63%3.41%6.43%
Hispanic or Latino (any race)9372,0742,86510.43%15.53%18.65%
Total8,98113,35215,358 100.00%100.00%100.00%

The 2020 United States census reported that Discovery Bay had a population of 15,358. The population density was 2,746.4 PD/sqmi. The racial makeup of Discovery Bay was 68.0% White, 4.8% African American, 0.7% Native American, 5.9% Asian, 0.5% Pacific Islander, 5.2% from other races, and 14.8% from two or more races. Hispanic or Latino of any race were 18.7% of the population.

There were 5,525 households, out of which 32.8% included children under the age of 18, 63.3% were married-couple households, 6.6% were cohabiting couple households, 15.8% had a female householder with no partner present, and 14.4% had a male householder with no partner present. 16.6% of households were one person, and 7.7% were one person aged 65 or older. The average household size was 2.78. There were 4,267 families (77.2% of all households).

The age distribution was 22.5% under the age of 18, 7.1% aged 18 to 24, 21.7% aged 25 to 44, 31.2% aged 45 to 64, and 17.4% who were 65years of age or older. The median age was 43.9years. For every 100 females, there were 101.0 males.

There were 6,063 housing units at an average density of 1,084.2 /mi2, of which 5,525 (91.1%) were occupied. Of these, 83.7% were owner-occupied, and 16.3% were occupied by renters.

In 2023, the US Census Bureau estimated that the median household income was $154,792, and the per capita income was $64,234. About 5.0% of families and 6.0% of the population were below the poverty line.

Education

Almost all of Discovery Bay CDP is in the Byron Union School District, while a small portion of the CDP is in the Knightsen Elementary School District. All of it is in the Liberty Union High School District.

There are two K–5 schools in the Byron district, and both were named California Distinguished Schools in 2012: Discovery Bay Elementary and Timber Point Elementary. Excelsior Middle School is located in Byron and is the district's sole 6–8 school. Major renovations and new buildings were completed at Excelsior Middle School in 2012. It was a California Distinguished School in early 2004. High school students (9–12) in all of Discovery Bay are zoned to attend Liberty High School in the Liberty Union High School District, located in nearby Brentwood. Liberty High School students have founded an arts group known as "PADA" and have arranged with city officials to allow select students to paint and personalize certain electrical boxes, walls, etc. in the theme of the town. Plans for a fifth high school on the south side of State Route 4 are on hold.

References

References

  1. {{Cite GovTrack. CA. 9
  2. "2020 U.S. Gazetteer Files". United States Census Bureau.
  3. {{Cite gnis. 1701762. Discovery Bay
  4. [https://www.census.gov/quickfacts/fact/table/discoverybaycdpcalifornia U.S. Census Bureau QuickFacts: Discovery Bay CDP, California] Retrieved November 2, 2022
  5. Stockton Chamber of Commerce. (1950-01-01). "1000 [one thousand] miles of Navigable Inland Fresh Waterways of the San Joaquin Delta". Maps of the San Joaquin Sacramento Delta.
  6. Lemyre, Rick. "The History of Place Names in Contra Costa." ''Brentwood Press''. December 16, 2011.
  7. Coetsee, Rowena. (June 28, 2012). "Discovery Bay goes for another world raft-up record".
  8. "2025 Newsletters".
  9. [http://www.californiataxdata.com/pdf/csd.pdf What is a Community Services District]. Retrieved May 29, 2017.
  10. {{usurped
  11. Gehlke, Roni. "Davies named Discovery Bay manager." ''Brentwood News''. December 30, 2016.
  12. "Decennial Census by Decade".
  13. "1870 Census of Population - Population of Civil Divisions less than Counties - California - Almeda County to Sutter County".
  14. "1870 Census of Population - Population of Civil Divisions less than Counties - California - Tehama County to Yuba County".
  15. "1890 Census of Population - Population of California by Minor Civil Divisions".
  16. "1900 Census of Population - Population of California by Counties and Minor Civil Divisions".
  17. "1910 Census of Population - Supplement for California".
  18. "1920 Census of Population - Number of Inhabitants - California".
  19. "1930 Census of Population - Number and Distribution of Inhabitants - California".
  20. "1940 Census of Population - Number of Inhabitants - California".
  21. "1950 Census of Population - Number of Inhabitants - California".
  22. "1960 Census of Population - General population Characteristics - California".
  23. "1970 Census of Population - Number of Inhabitants - California".
  24. "1980 Census of Population - Number of Inhabitants - California".
  25. "1990 Census of Population - Population and Housing Unit Counts - California".
  26. "2000 Census of Population - Population and Housing Unit Counts - California".
  27. "2010 Census of Population - Population and Housing Unit Counts - California".
  28. "P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Discovery Bay CDP, California".
  29. "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Discovery Bay CDP, California".
  30. "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Discovery Bay CDP, California".
  31. "Discovery Bay CDP, California; DP1: Profile of General Population and Housing Characteristics - 2020 Census of Population and Housing".
  32. "Discovery Bay CDP, California; P16: Household Type - 2020 Census of Population and Housing".
  33. "Discovery Bay CDP, California; DP03: Selected Economic Characteristics - 2023 ACS 5-Year Estimates Comparison Profiles".
  34. "2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Contra Costa County, CA". [[U.S. Census Bureau]].
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