US > California > Contra Costa County > Discovery Bay, CA 94505

94505 ZIP Code Profile, Map, Data & Demographics

Related Place Profiles:
Byron, CA | Discovery Bay, CA
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ZIP Code 94505: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Discovery Bay, CA 94505

Acceptable Alternative
Byron, CA 94505

  • ZIP Code Type: STANDARD
  • County: Contra Costa County
  • Centroid: Latitude 37.903, Longitude -121.602
  • Time Zone: Pacific Time Zone (UTC -8 hours)
  • Observes DST: Yes

ZIP Code 94505 has segments in 2 Counties (Alameda, Contra Costa).

  • Businesses Addresses: 226
  • PO Box Addresses: 271
  • Residential Addresses: 5,965
    • Multi-Family Addresses: 7
    • Single Family Addresses: 5,958

The ZIP Code maps and database are updated 4 times per year.
Database updated: June 1, 2025, Maps updated: May 1, 2024.

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Discovery Bay, CA 94505 Data & Demographics (As of July 1, 2025)

POPULATION

Total Population 14,726 (100%)
Population in Households 14,726 (100.0%)
Population in Families 12,284 (83.4%)
Population in Group Quarters1 0
Population Density 814
Diversity Index2 69
 
 

INCOME

Median Household Income $160,998
Average Household Income $193,752
% of Income for Mortgage4 34%
Per Capita Income $70,391
Wealth Index5 206
Socioeconomic Status Index6 Moderate (57.7)
 

HOUSING

Total HU (Housing Units) 5,924 (100%)
Owner Occupied HU 4,502 (76.0%)
Renter Occupied HU 848 (14.3%)
Vacant Housing Units 574 ( 9.7%)
Median Home Value $880,042
Average Home Value $1,013,757
Housing Affordability Index3 71
 

HOUSEHOLDS

Total Households 5,350
Average Household Size 2.75
Family Households 4,034
Average Family Size 3.00
NOTES
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR

 2020-2025 2025-2030
Population -0.21% -0.08%
Households -0.23% -0.05%
Families   -0.02%
Median Household Income   1.81%
Per Capita Income   1.84%
Owner Occupied HU   0.10%

Discovery Bay, CA 94505 - Peer Comparisons by Rank and Percentile

The table below compares 94505 to the other 1,774 ZIP Codes in California by rank and percentile using July 1, 2025 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 918 48th
Population Density # 876 51st
Median Household Income # 160 91st
Housing Affordability Index # 1527 86th
Per Capita Income # 291 84th
Diversity Index # 1066 40th

Additional comparisons and rankings can be made with a VERY EASY TO USE California Census Data Comparison Tool.


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