Antioch, CA · standard
ZIP Code 94531
Contra Costa County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 40,290
- 1,421/sq mi High-density area
- $120,927
- Median income Above-median income area
- $701,600
- Median home value Above-median home value
- 32.3%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Antioch pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.
- Top 9%
- household income, US ZIPs
- Top 6%
- home value, US ZIPs
- 1,421
- people per sq mi
- 73%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 94531 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 94531 (Antioch, CA) rose +1.9% from 2023 to 2024. The all-transactions index moved from 243.6 in 2023 to 248.3 in 2024 (2000 = 100).
ZIP code 94531 is a densely settled ZIP (a standard USPS delivery area) in Antioch, Contra Costa County, California, with 40,290 residents across 28.3 square miles, a density of 1,421 people per square mile, in the Los Angeles time zone.
ZIP 94531 skews affluent, with a median household income of $120,927 (19% above the average California ZIP), while per-capita income is $46,240. The poverty rate is 8.3%, with unemployment at 7.2%; those measures add context to the income figure. Median home value is $701,600 (9% below the average California ZIP) and median rent is $3,150; 73.2% of occupied homes are owner-occupied.
A solid share of residents have a four-year degree: 32.3% of adults hold a bachelor's degree or higher, the median age is 38.8, and the average commute is 44 minutes. The page also surfaces 7 ZIP codes within roughly 10 miles and 6 more in Contra Costa County, so 94531 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 94531
Top 5 sectors by establishment count in Antioch, CA
Which industries have the most business establishments in ZIP 94531.
- Health care and social assistance
Health care and social assistance
129 establishments
- Construction
Construction
76 establishments
- Retail trade
Retail trade
63 establishments
- Accommodation and food services
Accommodation and food services
56 establishments
- Professional, scientific, and technical services 47
Professional, scientific, and technical services
47 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 94531, Antioch, 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
40,290
Population
28.3
Area (sq mi)
1,421
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 94531?
38.8
Median Age
48.3%
Male
51.7%
Female
24.4%
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?
$120,927
Median Household Income
+19% vs state ZIP avg
$46,240
Per Capita Income
8.3%
Poverty Rate
7.2%
Unemployment Rate
44.2 min
Mean Commute Time
How ZIP 94531 ranks nationally
Antioch, CA household income vs. every US ZIP code
Median household income, the full national distribution, with this ZIP marked
$120,927 Top 9% higher than 91% of 30,318 US ZIPs
Each bar is a $20K-wide band; taller bars hold more US 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
14,239housing units
14,239
Total Housing Units
13,905
Occupied Units
334
Vacant Units
3.30
Avg Household Size
Occupancy Type
$701,600
Median Home Value
-9% vs state ZIP avg
$3,150
Median Rent
1997
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
+1.9%
YoY Change (2024)
248
HPI Index (2000 = 100)
+148%
Total Change Since 2000
Home values in ZIP 94531 have increased 1.9% over the past year (2024). Since 2000, this ZIP has seen +148% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +3.3% | 193 |
| 2021 | +17.8% | 227 |
| 2022 | +11.9% | 254 |
| 2023 | -4.1% | 244 |
| 2024 | +1.9% | 248 |
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 559 business establishments in ZIP 94531, employing approximately 7,748 people with a combined annual payroll of $517,020,000.
559
Businesses
7,748
Employees
$517.0M
Annual Payroll
15
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Health care and social assistance | 129 | 23.1% |
| Construction | 76 | 13.6% |
| Retail trade | 63 | 11.3% |
| Accommodation and food services | 56 | 10.0% |
| Professional, scientific, and technical services | 47 | 8.4% |
| Transportation and warehousing | 43 | 7.7% |
| Administrative and support and waste management and remediation services | 41 | 7.3% |
| Other services (except public administration) | 28 | 5.0% |
| Real estate and rental and leasing | 21 | 3.8% |
| Finance and insurance | 19 | 3.4% |
| Educational services | 10 | 1.8% |
| Wholesale trade | 7 | 1.3% |
| Arts, entertainment, and recreation | 7 | 1.3% |
| Manufacturing | 4 | 0.7% |
| Information | 4 | 0.7% |
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 94531 vs 94509 →
ZIP 94531 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 94565
Pittsburg (94565)
84,641 residents
- 94509
Antioch (94509)
62,439 residents
- 94513
Brentwood (94513)
54,605 residents
- 94531
Antioch (94531)
40,290 residents
- 94561
Oakley (94561)
36,515 residents
- 94517 12,385
Clayton (94517)
12,385 residents
- 94511 2,137
Bethel Island (94511)
2,137 residents
- 94548 412
Knightsen (94548)
412 residents
What this shows Among its immediate neighbors, ZIP 94531 ranks #4 by population - useful context the national average alone can't give.
ZIP 94531 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
- 94517
Clayton (94517)
$168,921 median income
- 94513
Brentwood (94513)
$142,223 median income
- 94561
Oakley (94561)
$134,678 median income
- 94531
Antioch (94531)
$120,927 median income
- 94565
Pittsburg (94565)
$95,556 median income
- 94509
Antioch (94509)
$86,196 median income
- 94511 $74,972
Bethel Island (94511)
$74,972 median income
What this shows By household income, ZIP 94531 ranks #5 of 8 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 94531, 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 (40,290 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 94531 in?
ZIP code 94531 (Antioch) 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 94531?
ZIP code 94531 in Antioch, CA has a population of 40,290 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 94531?
The median household income in ZIP 94531 is $120,927, which is 59% above the national average of $76,288.
What is the average home value in ZIP 94531?
The median home value in ZIP 94531 is $701,600, which is 152% above the national average of $278,155.
What is the demographic makeup of ZIP 94531?
The largest racial group in ZIP 94531 is White at 26.0%. Hispanic or Latino residents make up 23.6% of the population.
How many businesses are in ZIP code 94531?
ZIP code 94531 has 559 business establishments employing approximately 7,748 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 94531?
The top industries by establishment count in ZIP 94531 are: Health care and social assistance (129), Construction (76), Retail trade (63). There are 15 industry sectors represented in total.
How have home values changed in ZIP code 94531?
According to the FHFA House Price Index, home values in ZIP 94531 increased by 1.9% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 148%. 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 94531?
In ZIP code 94531, 57.0% of residents aged 25+ have a high school diploma or higher, and 32.3% 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 94531?
The mean commute time for workers in ZIP code 94531 is 44.2 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 94531?
In ZIP code 94531, approximately 73.2% of occupied housing units are owner-occupied and 26.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 94531?
The poverty rate in ZIP code 94531 is 8.3% 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 94531's numbers, next.
- See how ZIP 94531 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Antioch, 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.