Knightsen, CA · standard
ZIP Code 94548
Contra Costa County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 412
- 58/sq mi Moderate-density area
- $189,653
- Median income Above-median income area
- $959,900
- Median home value Above-median home value
- 22.3%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Knightsen pairs a top-decile household income with top-decile home values, in a rural, homeowner-dominated area.
- Top 1%
- household income, US ZIPs
- Top 3%
- home value, US ZIPs
- 58
- people per sq mi
- 100%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 94548 against every reporting US ZIP.
ZIP code 94548 is a sparsely populated ZIP (a standard USPS delivery area) in Knightsen, Contra Costa County, California, home to just 412 residents across 7.2 square miles, a density of 58 people per square mile, in the Los Angeles time zone.
ZIP 94548 skews affluent, with a median household income of $189,653 (87% above the average California ZIP), while per-capita income is $64,991. Unemployment is 13.5%, an important qualifier alongside the household-income figure. Housing is both higher-cost and owner-heavy: median home value is $959,900 (24% above the average California ZIP), while 100.0% of occupied homes are owner-occupied.
Educational attainment sits below the national norm: 22.3% of adults hold a bachelor's degree or higher, the median age is 44.2, and the average commute is -. The page also surfaces 7 ZIP codes within roughly 10 miles and 6 more in Contra Costa County, so 94548 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 →
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 94548, Knightsen, 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
412
Population
7.2
Area (sq mi)
58
People / sq mi
Los Angeles
Time Zone
standard
ZIP Type
Who lives in ZIP 94548?
44.2
Median Age
50.6%
Male
49.4%
Female
27.5%
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?
$189,653
Median Household Income
+87% vs state ZIP avg
$64,991
Per Capita Income
9.1%
Poverty Rate
13.5%
Unemployment Rate
How ZIP 94548 ranks among California ZIPs
Knightsen, 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)
$189,653 Top 6% higher than 94% 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
259housing units
259
Total Housing Units
259
Occupied Units
0
Vacant Units
3.21
Avg Household Size
Occupancy Type
$959,900
Median Home Value
+24% vs state ZIP avg
1968
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 10 business establishments in ZIP 94548, employing approximately 60 people with a combined annual payroll of $2,528,000.
10
Businesses
60
Employees
$2.5M
Annual Payroll
2
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 3 | 30.0% |
| Administrative and support and waste management and remediation services | 3 | 30.0% |
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 94548 vs 94561 →
ZIP 94548 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
- 94531
Antioch (94531)
40,290 residents
- 94561
Oakley (94561)
36,515 residents
- 94505 13,403
Discovery Bay (94505)
13,403 residents
- 94511 2,137
Bethel Island (94511)
2,137 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 94548 ranks #7 by population - useful context the national average alone can't give.
ZIP 94548 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
- 94505
Discovery Bay (94505)
$146,480 median income
- 94513
Brentwood (94513)
$142,223 median income
- 94561
Oakley (94561)
$134,678 median income
- 94531
Antioch (94531)
$120,927 median income
- 94514
Byron (94514)
$76,511 median income
- 94511 $74,972
Bethel Island (94511)
$74,972 median income
What this shows By household income, ZIP 94548 ranks the highest of 7 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 94548, both outside CA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
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 94548 in?
ZIP code 94548 (Knightsen) 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 94548?
ZIP code 94548 in Knightsen, CA has a population of 412 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 94548?
The median household income in ZIP 94548 is $189,653, which is 149% above the national average of $76,288.
What is the average home value in ZIP 94548?
The median home value in ZIP 94548 is $959,900, which is 245% above the national average of $278,155.
What is the demographic makeup of ZIP 94548?
The largest racial group in ZIP 94548 is White at 59.5%. Hispanic or Latino residents make up 63.3% of the population.
How many businesses are in ZIP code 94548?
ZIP code 94548 has 10 business establishments employing approximately 60 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 94548?
In ZIP code 94548, 49.0% of residents aged 25+ have a high school diploma or higher, and 22.3% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the poverty rate in ZIP code 94548?
The poverty rate in ZIP code 94548 is 9.1% 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 94548's numbers, next.
- See how ZIP 94548 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Knightsen, 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.