Discovery Bay, CA · standard
ZIP Code 94505
Contra Costa County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 13,403
- 326/sq mi High-density area
- $146,480
- Median income Above-median income area
- $830,500
- Median home value Above-median home value
- 32.6%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Discovery Bay pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.
- Top 4%
- household income, US ZIPs
- Top 4%
- home value, US ZIPs
- 326
- people per sq mi
- 90%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 94505 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 94505 (Discovery Bay, CA) rose +3.8% from 2023 to 2024. The all-transactions index moved from 238.3 in 2023 to 247.3 in 2024 (2000 = 100).
ZIP code 94505 is a mid-sized community (a standard USPS delivery area) in Discovery Bay, Contra Costa County, California, home to 13,403 residents across 41.1 square miles, a density of 326 people per square mile, in the Los Angeles time zone.
ZIP 94505 skews affluent, with a median household income of $146,480 (44% above the average California ZIP), while per-capita income is $64,094. The poverty rate is 7.4%, with unemployment at 8.6%; those measures add context to the income figure. Median home value is $830,500 (7% above the average California ZIP) and median rent is $3,029; 90.2% of occupied homes are owner-occupied.
A solid share of residents have a four-year degree: 32.6% of adults hold a bachelor's degree or higher, the median age is 45.8, and the average commute is 44 minutes. The page also surfaces 6 ZIP codes within roughly 10 miles and 6 more in Contra Costa County, so 94505 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 94505
Top 5 sectors by establishment count in Discovery Bay, CA
Which industries have the most business establishments in ZIP 94505.
- Professional, scientific, and technical services
Professional, scientific, and technical services
46 establishments
- Construction
Construction
45 establishments
- Real estate and rental and leasing
Real estate and rental and leasing
30 establishments
- Administrative and support and waste management and remediation services 14
Administrative and support and waste management and remediation services
14 establishments
- Other services (except public administration) 11
Other services (except public administration)
11 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 94505, Discovery Bay, CA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
13,403
Population
41.1
Area (sq mi)
326
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 94505?
45.8
Median Age
49.3%
Male
50.7%
Female
12.2%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$146,480
Median Household Income
+44% vs state ZIP avg
$64,094
Per Capita Income
7.4%
Poverty Rate
8.6%
Unemployment Rate
44.1 min
Mean Commute Time
How ZIP 94505 ranks among California ZIPs
Discovery Bay, CA household income vs. every California ZIP code
Median household income among 1,583 reporting California ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$146,480 Top 14% higher than 86% of 1,583 California ZIPs
Each bar is a $20K-wide band; taller bars hold more California ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
6,092housing units
6,092
Total Housing Units
5,446
Occupied Units
646
Vacant Units
2.74
Avg Household Size
Occupancy Type
$830,500
Median Home Value
+7% vs state ZIP avg
$3,029
Median Rent
1995
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+3.8%
YoY Change (2024)
247
HPI Index (2000 = 100)
+147%
Total Change Since 2000
Home values in ZIP 94505 have increased 3.8% over the past year (2024). Since 2000, this ZIP has seen +147% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +2.7% | 187 |
| 2021 | +15.6% | 216 |
| 2022 | +13.4% | 244 |
| 2023 | -2.5% | 238 |
| 2024 | +3.8% | 247 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 199 business establishments in ZIP 94505, employing approximately 1,170 people with a combined annual payroll of $66,923,000.
199
Businesses
1,170
Employees
$66.9M
Annual Payroll
13
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 46 | 23.1% |
| Construction | 45 | 22.6% |
| Real estate and rental and leasing | 30 | 15.1% |
| Administrative and support and waste management and remediation services | 14 | 7.0% |
| Other services (except public administration) | 11 | 5.5% |
| Accommodation and food services | 10 | 5.0% |
| Retail trade | 8 | 4.0% |
| Wholesale trade | 7 | 3.5% |
| Health care and social assistance | 7 | 3.5% |
| Arts, entertainment, and recreation | 7 | 3.5% |
| Transportation and warehousing | 5 | 2.5% |
| Finance and insurance | 4 | 2.0% |
| Information | 3 | 1.5% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 94505 vs 94514 →
ZIP 94505 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 94513
Brentwood (94513)
54,605 residents
- 94561
Oakley (94561)
36,515 residents
- 94505 13,403
Discovery Bay (94505)
13,403 residents
- 95391 9,959
Tracy (95391)
9,959 residents
- 94514 1,360
Byron (94514)
1,360 residents
- 94548 412
Knightsen (94548)
412 residents
- 95234 70
Holt (95234)
70 residents
What this shows Among its immediate neighbors, ZIP 94505 ranks #3 by population - useful context the national average alone can't give.
ZIP 94505 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 94548
Knightsen (94548)
$189,653 median income
- 95391
Tracy (95391)
$176,952 median income
- 94505
Discovery Bay (94505)
$146,480 median income
- 94513
Brentwood (94513)
$142,223 median income
- 94561
Oakley (94561)
$134,678 median income
- 94514
Byron (94514)
$76,511 median income
What this shows By household income, ZIP 94505 ranks #3 of 6 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 94505, both outside CA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (13,403 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Contra Costa County
Related Areas
Frequently Asked Questions
What county is ZIP code 94505 in?
ZIP code 94505 (Discovery Bay) is located in Contra Costa County, California. Contra Costa County contains multiple ZIP codes, see the full list at /counties/contra-costa-ca.
What is the population of ZIP code 94505?
ZIP code 94505 in Discovery Bay, CA has a population of 13,403 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 94505?
The median household income in ZIP 94505 is $146,480, which is 92% above the national average of $76,288.
What is the average home value in ZIP 94505?
The median home value in ZIP 94505 is $830,500, which is 199% above the national average of $278,155.
What is the demographic makeup of ZIP 94505?
The largest racial group in ZIP 94505 is White at 59.0%. Hispanic or Latino residents make up 19.2% of the population.
How many businesses are in ZIP code 94505?
ZIP code 94505 has 199 business establishments employing approximately 1,170 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 94505?
The top industries by establishment count in ZIP 94505 are: Professional, scientific, and technical services (46), Construction (45), Real estate and rental and leasing (30). There are 13 industry sectors represented in total.
How have home values changed in ZIP code 94505?
According to the FHFA House Price Index, home values in ZIP 94505 increased by 3.8% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 147%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 94505?
In ZIP code 94505, 54.8% of residents aged 25+ have a high school diploma or higher, and 32.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 94505?
The mean commute time for workers in ZIP code 94505 is 44.1 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 94505?
In ZIP code 94505, approximately 90.2% of occupied housing units are owner-occupied and 9.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 94505?
The poverty rate in ZIP code 94505 is 7.4% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 94505's numbers, next.
- See how ZIP 94505 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Discovery Bay, CA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.