ZIP code
94505
Discovery Bay, CA
94505 covers Discovery Bay in Contra Costa County, with 15,316 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 94505. Methodology
ZIP code map of 94505

About ZIP code 94505
Acceptable cities: Byron
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 94505. Not ACS. Methodology
People in 94505
Race
- White10,514
- Black or African American741
- American Indian or Alaska Native106
- Asian906
- Native Hawaiian and Pacific Islander82
- Other race807
- Two or more races2,289
Hispanic or Latino (any race): 2,881
Age
- Under 101,671
- 10 to 192,167
- 20 to 291,368
- 30 to 391,765
- 40 to 492,049
- 50 to 592,613
- 60 to 692,016
- 70 to 791,347
- 80 and older449
Income and housing in 94505
Education
- High school graduate94.4%
- Bachelor's degree33.0%
- Graduate degree11.1%
Places covering 94505
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
- Discovery Bay99.4%
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Contra Costa County99.6%
- Alameda County0.4%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
0.6% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 94505
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2006 | 1,110 | |
| 2007 | 10,883 | |
| 2008 | 11,278 | |
| 2009 | 12,005 | |
| 2010 | 12,386 | |
| 2011 | 12,560 | 12,496 |
| 2012 | 12,680 | 12,570 |
| 2013 | 13,083 | 12,950 |
| 2014 | 14,353 | 13,020 |
| 2015 | 14,687 | 13,440 |
| 2016 | 14,820 | 13,900 |
| 2017 | 15,780 | 14,310 |
| 2018 | 16,251 | 14,230 |
| 2019 | 16,382 | 14,560 |
| 2020 | 15,974 | 14,540 |
| 2021 | 15,796 | 14,340 |
| 2022 | 15,445 | 14,010 |
| 2023 | 15,316 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 94505
12 nearest ZIP centroids (any distance)
- 94514Byron3.8 miPop 2,044 · Income $97,946
- 94513Brentwood6.1 miPop 68,160 · Income $139,736
- 95391Tracy6.3 miPop 25,193 · Income $171,510
- 94548Knightsen7.7 miPop 637 · Income $183,100
- 94561Oakley9.9 miPop 45,386 · Income $130,859
- 94511Bethel Island11.0 miPop 2,144 · Income $78,393
- 95206Stockton11.3 miPop 67,501 · Income $79,751
- 94531Antioch11.5 miPop 44,746 · Income $123,428
- 94551Livermore11.8 miPop 38,739 · Income $130,705
- 95219Stockton12.4 miPop 31,200 · Income $105,300
- 95376Tracy12.9 miPop 54,853 · Income $103,493
- 95377Tracy14.3 miPop 36,182 · Income $155,984
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 94505, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
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ZIP code 94505 FAQ
- What city is ZIP code 94505 in?
- 94505 is in Discovery Bay, CA.
- What county is 94505 in?
- 94505 is in Contra Costa County.
- What is the median household income in 94505?
- The median household income in 94505 is $154,063.
- Which ZIP codes are near 94505?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 94505.