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Population & Demographics

ZIP Code 94505 has 15,445 residents and 5,573 households (average 2.77 persons per household). The median age is 43.9 years, older than the state (37.5) and older than the nation (38.8). The gender split is 50.2% male and 49.8% female, which is slightly higher than the national male share (49.1%). Largest groups are White (68.1%, much higher than the state average of 41.2%) and Hispanic or Latino (18.7%); Hispanic or Latino residents make up 18.7%, which is much lower than the state average (39.4%).

Explore More:Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship

Source: U.S. Census 2020 Demographics & Housing Characteristics (DHC) and U.S. Census 2011-2023 American Community Survey (ACS) 5-Year Estimates.

2020 Population:	15,445Source: Census DHC
2023 ACS Population Estimate:	15,316Source: Census ACS
2025 ZC Population Estimate:	16,777Source: ZIP-Codes.com
Population Density:	926.4 people per sq mile
Average Income:	$154,063Source: Census ACS

Households:	5,573Source: Census DHC
Average House Value:	$787,500Source: Census ACS
Persons Per Household:	2.77Source: Census DHC
Average Family Size:	2.74Source: Census ACS

Population Over Time (with 2010 & 2020 Census Benchmarks)

Line chart of ZIP 94505 population estimates from 2011-2023, with markers for the 2010 and 2020 Decennial Census counts to show growth or decline over time. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2010	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Census ACS Population Estimate	--	12,560	12,680	13,083	14,353	14,687	14,820	15,780	16,251	16,382	15,974	15,796	15,445	15,316
Decennial Census	13,403	--	--	--	--	--	--	--	--	--	15,445	--	--	--

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP05. DEMOGRAPHIC AND HOUSING ESTIMATES

Population by Age & Gender (Total, Male, Female)

Median Age: 43.9

Male Median Age: 43.2

Female Median Age: 44.5

Line chart for ZIP 94505 showing total, male, and female population by age group. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	< 5	5-9	10-14	15-19	20-24	25-29	30-34	35-39	40-44	45-49	50-54	55-59	60-64	65-69	70-74	75-79	80-84	85+
Male	410	455	589	572	382	311	394	462	464	527	604	709	559	447	368	291	130	84
Female	372	434	518	488	357	318	415	494	498	560	642	658	567	443	428	260	134	101
Total	782	889	1,107	1,060	739	629	809	956	962	1,087	1,246	1,367	1,126	890	796	551	264	185

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Pie Chart & Table Comparison Chart

Population by Race

Pie chart of the racial and ethnic makeup of ZIP 94505. Table below includes counts and percentages. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

White:	10,514	65.56%
Black:	741	4.62%
Hispanic:*	2,881	17.96%
Asian:	906	5.65%
American Indian:	106	0.66%
Hawaiian:	82	0.51%
Other:	807	5.03%
Total:	16,037	100%

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

* NOTE: Hispanic or Latino is an ethnicity, not a race. This means individuals who identify as Hispanic will also be included in one of the race categories (such as White or Black). As a result, the totals shown here may exceed 100% when Hispanic is displayed alongside racial groups.

Pie Chart & Table Comparison Chart

Gender Breakdown

Simple chart showing male vs female share of the population in ZIP Code 94505. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Gender	Count	%	Median Age
Males:	7,758	50.23%	43.2 years
Females:	7,687	49.77%	44.5 years
Total:	15,445	100%	43.9 years

Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Nativity & Citizenship

Pie chart showing nativity in ZIP 94505. Categories include native residents (born in the United States, Puerto Rico, U.S. Island Areas, or abroad to American parents) and foreign-born residents. A table below lists counts and percentages. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Native, born in the United States:	13,567	88.58%
Native, born in PR, Island Areas, or abroad:	56	0.37%
Foreign born, naturalized U.S. citizen:	1,234	8.06%
Foreign born, not a U.S. citizen:	459	11.05%
Total Population:	15,316	100%
Total Native Population:	13,623	88.95%
Total Foreign-born Population:	1,693	11.05%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Note: Nativity and Citizenship derived from American Community Survey (ACS) 5-year estimates. Total Population listed here will not match official ZIP Code population totals, which are based on the Decennial Census.

Income & Employment

In 2023, the Median household income is $154,063, which is considerably higher than the national median ($78,538), is up $51,735 (50.6%) since 2011 and above its 2019 pre-pandemic level by $24,050. Family households earn a median of $155,590 versus $101,023 for nonfamily households (a difference of $54,567). By gender, male median income is $122,273 and female is $79,705, which is much higher than the national female median ($53,445), with a current gap of $42,568 that has widened from 2011 to 2023. The labor-force participation rate is 62.4%, which is trails slightly the state rate (63.9%). The unemployment rate is 8.1%, which is markedly higher than the national rate (5.2%). The largest occupation group is Management (46.1%).

Explore More:Income Over Time Household Income Employment Status By Occupation

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Tables DP02, DP03, DP04 and DP05.

Median Income Over Time (Household, Family, Nonfamily, Male, Female)

Line chart showing median income in ZIP 94505 from 2011-2023 for five series: household, family, nonfamily, male, and female. The table below lists the yearly values. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Income Type	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Household Income	$102,328	$107,972	$111,290	$111,833	$106,394	$106,068	$114,886	$114,977	$130,013	$128,865	$138,339	$147,292	$154,063
Median Family Income	$104,298	$105,813	$112,373	$113,872	$106,748	$109,028	$121,563	$121,020	$136,213	$133,880	$140,417	$147,384	$155,590
Median NonFamily Income	$59,000	$112,344	$84,839	$77,891	$77,778	$74,688	$60,699	$69,583	$88,030	$91,477	$94,485	$117,992	$101,023
Median Male Income	$83,448	$94,276	$89,000	$85,395	$79,659	$85,885	$88,092	$85,563	$90,758	$95,762	$103,750	$112,038	$122,273
Median Female Income	$53,011	$53,569	$54,503	$58,910	$56,076	$59,663	$61,929	$65,610	$69,917	$70,744	$77,917	$75,688	$79,705

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Average Household Income

Bar chart showing average household income comparing ZIP 94505, city of Discovery Bay, Contra Costa County, state of California, and United States national values. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Pie Chart & Table Comparison Chart

Employment Status

Pie chart of employment status for ZIP 94505, showing the shares who are employed, unemployed, and not in the labor force. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Employed:	7,268	57.30%
Unemployed:	642	5.06%
Not In Labor Force:	4,774	37.64%
Total:	12,684	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Employment by Occupation (Civilian Employed Population, 16 and Over)

Donut Chart showing the distribution of employed civilians aged 16 and over by occupation category: management, service, sales and office, natural resources and construction, and production and transportation. A table with the same data and percentages is provided as well.Load Chart Manually (if needed)

Management, business, science, and arts:	3,349	46.08%
Service:	1,037	14.27%
Sales and Office:	1,788	24.60%
Natural resources, construction, and maintenance:	684	9.41%
Production, transportation, and material moving:	410	5.64%
Total Civilian Employed Population:	7,268	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS.

Housing & Affordability

In 2023, the median home value is $787,500, which is much higher than the national median ($303,400), is up $277,200 (54.32%) since 2011 and above its 2019 pre-pandemic level by $172,300. The median gross rent is $2,894, which is markedly greater than the national median ($1,348), is up $893 (44.63%) since 2011 and above its 2019 pre-pandemic level by $362. Of occupied housing, owners make up 88.74% (76.20% with a mortgage, 23.80% free-and-clear) and renters 11.26% - making this ZIP Code more home ownership than the state and under national rental averages. The vacancy rate is 10.01%, which is considerably higher than the state rate (7.55%).

Explore More:Compare Home Value Home Value Over Time Rent & Over Time Housing Occupancy

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Table DP03, SELECTED ECONOMIC CHARACTERISTICS.

Median Home Value (Comparison)

Bar chart showing the median home value for ZIP 94505, compared with Discovery Bay, Contra Costa County, state of California, and the U.S. National Average. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Home Value Over Time

Line chart showing median home values for ZIP 94505 across years 2011-2023 using ACS 5-year estimates. The chart displays the typical dollar value of owner-occupied housing units. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Home Value	$510,300	$393,200	$374,900	$385,700	$400,800	$461,300	$535,000	$573,400	$615,200	$640,100	$674,800	$768,200	$787,500

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Gross Rent Paid

Pie chart of gross rent for renter-occupied homes in ZIP 94505, showing monthly rent brackets and the share of units in each range. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Less than $500:	0	0.00%
$500 to $999:	0	0.00%
$1,000 to $1,499:	21	3.38%
$1,500 to $1,999:	0	0.00%
$2,000 to $2,499:	101	16.24%
$2,500 to $2,999:	213	34.24%
$3,000 or more:	245	39.39%
No Rent:	42	6.75%
Total:	622	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Gross Rent Over Time

Line chart displaying median gross rent for ZIP 94505 over the years 2011-2023 using ACS 5-year estimates. The chart represents typical monthly housing costs for renter households. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Rent	$2,001	$2,001	$2,001	$2,001	$2,116	$2,167	$2,311	$2,442	$2,532	$2,612	$2,717	$2,859	$2,894

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Housing Occupancy

Pie chart showing housing occupancy for ZIP 94505. Categories include owner-occupied units with a mortgage, owner-occupied units free and clear, and renter-occupied units. A table below lists counts and percentages. Vacant housing units are shown separately in the Vacancy chart. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Owner Occupied (with mortgage):	3,734	67.62%
Owner Occupied (free and clear, no mortgage):	1,166	21.12%
Renter Occupied:	622	11.26%
Total Occupied Housing Units:	5,522	100%

Occupied Housing Units:	5,522	89.99%
Vacant Housing Units (not graphed):	614	10.01%
Total Housing Units:	6,136	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Housing Type (Single-Family, Multi-Family, Other)

Pie chart showing housing type distribution for ZIP 94505. Categories include single-family units (detached or attached), multi-family units (from 2 units up to 50 or more units), and other structures such as mobile homes or boats/RVs. A table below lists counts and percentages for each group.Load Chart Manually (if needed)

Single-Family Units:	6,052	98.63%
Multi-Family Units:	72	1.17%
Other Units:	12	0.20%
Total Housing Units:	6,136	100%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Education, Health & Community

In 2023, 33.00% of adults (25+) have a bachelor's degree or higher, which is on par with the state rate (36.50%). High school or higher is 94.40%, which is markedly above the state rate (84.60%). The uninsured rate is 4.60%, which is falls below the national rate (8.60%). Private coverage is 85.20%, which is notably higher than the state rate (64.00%). Public coverage is 26.20%, which is generally lower than the state rate (38.90%). The share of people in poverty is 5.00%, which is comparable to the national rate (8.70%), down 0.90 percentage points since 2011 and above its 2019 pre-pandemic level by 0.60 percentage points. This suggests a positive shift in the local economic and social landscape - higher incomes, steadier consumer demand, and a strengthening tax base. Among residents ages 3+, the largest enrollment group is high school (35.60%). College enrollment is 25.27%, which is on par with the state rate (30.00%), meaning the community mirrors broader higher-education participation.

Explore More:Educational Attainment Health Insurance Poverty Over Time School Enrollment

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Tables DP02 and DP03.

Educational Attainment of Adults (25 and Older)

Pie chart of educational attainment for adults (25+) in ZIP 94505, including each level from less than 9th grade to graduate/professional. Summary rows show high school or higher and bachelor's or higher. A table lists counts and percentages.Load Chart Manually (if needed)

Less than 9th grade:	84	0.78%
9th to 12th grade, no diploma:	518	4.82%
High school graduate (includes equivalency):	2,257	20.99%
Some college, no degree:	2,906	27.03%
Associate's degree:	1,435	13.35%
Bachelor's degree:	2,363	21.98%
Graduate or professional degree:	1,189	11.06%
Total:	10,752	100%
High school or higher:	10,150	94.40%
Bachelor's degree or higher:	3,552	33.04%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Pie Chart & Table Comparison Chart

Health Insurance Coverage by Type (Private, Public, Uninsured)

Pie chart illustrating health insurance coverage by type for ZIP Code 94505. Categories include private insurance, public coverage such as Medicare and Medicaid, and individuals with no health insurance. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Private Insurance:	13,051	73.47%
Public Insurance:	4,013	22.59%
No Insurance:	699	3.94%
Total:	17,763	100%
Has Health Insurance:	17,064	96.06%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Percentage of People in Poverty Over Time (2011-2023)

Line chart displaying the share of families and people in ZIP 94505 whose income falls below the federal poverty threshold, using ACS 5-year estimates from 2011 through 2023. The chart shows year-to-year changes in the percentage of people in poverty. Chart loads automatically and replaces this content. Load Chart Manually (if needed)

Group	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
% of People in Poverty	5.9%	6.3%	5.3%	4.8%	5.8%	4.3%	4.8%	4.9%	4.4%	7.4%	5.9%	5.4%	5.0%

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.

School Enrollment by Education Level (Ages 3 and Older)

Pie Chart showing enrollment of residents ages 3 and older in Nursery School or Preschool, Kindergarten, Elementary (grades 1-8), High School (grades 9-12), and College or Graduate School. A table with the same data and percentages is provided as well.Load Chart Manually (if needed)

Nursery School, Preschool:	209	5.61%
Kindergarten:	241	6.46%
Elementary school (grades 1-8):	1,009	27.07%
High school (grades 9-12):	1,327	35.60%
College or graduate school:	942	25.27%
Total:	3,728	100%
Early Childhood:	450	12.07%
K-12 (Primary & Secondary School):	2,577	69.13%

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

City:	Discovery Bay, California
City Alias:	Byron
Counties:	Contra Costa County[Primary] Alameda County
Timezone:	Pacific (GMT -08:00)
Local Time:	8:53:38 PM
Population:	15,445 [See All]
Area Code:	925
Classification:	Standard [Normal Street Delivery]
Coordinates:	37.8887, -121.6020
Land Area:	16.672 sq mi
Quick Link:	https://www.zip-codes.com/zip-code/94505/zip-code-94505.asp

# Residential Mailboxes:	6,057Source: USPS
# Business Mailboxes:	79Source: USPS
Total Delivery Receptacles:	9,805Source: USPS
Single Family Delivery Units:	5,753Source: USPS
Multi Family Delivery Units:	7Source: USPS

# of Businesses:	199Source: CBP
1st Quarter Payroll:	$16,528,000Source: CBP
Annual Payroll:	$66,923,000Source: CBP
# of Employees:	1,170Source: CBP

CBSA Name:	San Francisco-Oakland-Fremont, CASource: Census
CBSA Number:	41860Source: Census
CBSA Type:	MetroSource: Census
CBSA Division:	Oakland-Fremont-Berkeley, CA (CBSA Div 36084)Source: Census
CBSA Population:	4,653,593Source: Census
MSA:	San Francisco-Oakland-San Jose, CA CMSASource: Census
Land Area:	16.672 sq miSource: Census
Water Area:	5.794 sq miSource: Census

Congressional District:	09,10,14Source: USPS
Congressional Land Area:	1245.28, 1818.79, 259.5 sq miSource: Census
PMSA:	Oakland, CA PMSASource: Census
Intro Date:	2007-06Source: ZIP-Codes.com
Place FIPS Code:	0619339Source: Census
Place Name:	Discovery Bay CDP; CaliforniaSource: Census

ZIP Code 94505 in Discovery Bay, CA

Population & Demographics

Population Over Time (with 2010 & 2020 Census Benchmarks)

Population by Age & Gender (Total, Male, Female)

Population by Race

Gender Breakdown

Nativity & Citizenship

Income & Employment

Median Income Over Time (Household, Family, Nonfamily, Male, Female)

Average Household Income

Employment Status

Employment by Occupation (Civilian Employed Population, 16 and Over)

Housing & Affordability

Median Home Value (Comparison)

Median Home Value Over Time

Gross Rent Paid

Median Gross Rent Over Time

Housing Occupancy

Housing Type (Single-Family, Multi-Family, Other)

Education, Health & Community

Educational Attainment of Adults (25 and Older)

Health Insurance Coverage by Type (Private, Public, Uninsured)

Percentage of People in Poverty Over Time (2011-2023)

School Enrollment by Education Level (Ages 3 and Older)

Business & Employment Statistics

Geography, Land Area, & Statistical Classifications

Adjacent & Nearby ZIP Codes

Schools in ZIP Code 94505

Colleges & Post Secondary Schools near ZIP Code 94505

Sources & References