94548 ZIP Code — Knightsen, CA

Contra Costa County, California

ZIP code 94548 is located in Knightsen, California, within Contra Costa County. It covers approximately 2.31 square miles and serves a population of 598 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 925.

About ZIP code 94548

The housing stock consists of predominantly single-family detached homes. Much of the housing stock is relatively new, reflecting recent development activity. Median home value is $1,041,700.

Median household income is $166,597. The poverty rate of 3% is below the national average.

The dominant occupation class is production, transportation, and material moving, with education and healthcare as the leading industry. An above-average commute of 52 minutes suggests many residents work outside the immediate area.

Educational attainment is near the national average, with 41% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 15% of civilians, above the national average of 7%.

Overall, ZIP code 94548 reflects a community defined by a strong veteran community and high homeownership.

598
population
2.31
sq mi land
Standard
ZIP type
Pacific (PT)
timezone
94548 ZIP code map
Cities in ZIP code 94548

Below are the cities the US Postal Service accepts for ZIP code 94548. Using any city not on this list may result in mail delivery delays.

City Status
Knightsen Acceptable
Demographics updated 06/2026
Population
Total population 598
Population density 259 / sq mi
State FIPS 06
County FIPS 013
Geography
Land area 2.31 sq mi
Water area 0.09 sq mi
Latitude 37.9774
Longitude -121.6442
Timezone Pacific (PT)
Area code 925
Total population by age
Gender
Race & ethnicity
Economics updated 06/2026
Household income
Income range This ZIP County avg State avg
Under $50k 8.7% 23.2% 32.6%
$50k – $100k 11.0% 25.1% 27.7%
$100k – $200k 51.2% 31.3% 26.4%
Over $200k 29.1% 20.4% 13.3%

Demographics & statistics

598
Population
259
People per sq mi
34.0
Median age
$166,597
Median household income
$58,519
Per capita income
$1,041,700
Median home value
$0
Median monthly rent
100.0%
Home ownership
2.7%
Poverty rate
0.0%
Unemployment
211
Housing units
40.7%
Bachelor's or higher

Age distribution

Male Female
67
Under 5
67
23
5–9
23
6
10–14
5
37
15–19
36
41
25–34
41
68
35–44
67
25
45–54
24
27
60–64
26
8
85+
7
← Male
Female →

Age summary

GroupCount%
Under 1823839.8%
18 and over36060.2%
65 and over152.5%
Median age34.0 years

Race & ethnicity

White 49.6%
Hispanic or Latino 23.9%
Two or more races 21.8%
American Indian / Alaska Native 2.5%
Other race 2.2%
GroupCount%
White39049.6%
Hispanic or Latino18823.9%
Two or more races17121.8%
American Indian / Alaska Native202.5%
Other race172.2%

Household income

Income range This ZIP County avg State avg
Under $50k 8.7% 23.2% 32.6%
$50k – $100k 11.0% 25.1% 27.7%
$100k – $200k 51.2% 31.3% 26.4%
Over $200k 29.1% 20.4% 13.3%
$35k–$50k 14.7%
$50k–$75k 8.1%
$100k–$150k 2.8%
$150k–$200k 50.7%
$200k+ 23.7%
Range% of households
$35k–$50k14.7%
$50k–$75k8.1%
$100k–$150k2.8%
$150k–$200k50.7%
$200k+23.7%
Median income$166,597

Housing

Home values

$300k–$500k 8.1%
$500k–$1M 35.1%
$1M+ 56.9%

Housing overview

MetricValue
Median home value$1,041,700
Median rent / month$0
Owner occupied100.0%
Renter occupied0.0%
Vacant0.0%
Single-family detached100.0%
Large apartment buildings0.0%
Mobile homes0.0%
Median rooms6.6
Avg household size (owned)2.83

Year built

Era%
2020 or later41.2%
2010–20190.0%
2000–20092.8%
1990–19998.1%
1980–19897.6%
1970–19798.1%
1960–19697.1%
1950–195917.1%
1940–19490.0%
1939 or earlier8.1%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom0.0%
2 bedrooms8.1%
3 bedrooms32.2%
4 bedrooms59.7%
5+ bedrooms0.0%

Vehicles per household

Vehicles% of households
No vehicle25.1%
1 vehicle14.7%
2 vehicles44.5%
3 or more15.6%

Heating fuel

Fuel type%
Utility gas10.0%
Electricity31.8%
Propane / LP gas7.6%
No fuel used17.1%

Households & families

Household typeCount%
Married-couple family11052.1%
Cohabiting couple178.1%
Male householder, no spouse6932.7%
Female householder, no spouse157.1%
Households with children under 1812559.2%
Households with seniors (65+)157.1%
Average household size2.83

Marital status

StatusMaleFemale
Never married11.2%41.1%
Married72.7%51.5%
Separated0.0%0.0%
Widowed0.0%7.4%
Divorced16.1%0.0%

Education

Less than 9th grade 1.5%
Some HS, no diploma 6.0%
HS graduate 24.6%
Some college, no degree 27.2%
Associate's degree 0.0%
Bachelor's degree 40.7%
Graduate / professional 0.0%
Metric%
HS diploma or higher92.5%
Bachelor's or higher40.7%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool00.0%
Kindergarten3531.8%
Elementary school2220.0%
High school3128.2%
College / grad school2220.0%

Employment

Industry of employment

Education & healthcare 30.6%
Construction 18.8%
Retail trade 14.4%
Professional & management 14.4%
Finance & real estate 7.4%
Other services 7.4%
Transportation & utilities 7.0%

Occupation

Category%
Management, business & arts36.2%
Service0.0%
Sales & office14.4%
Natural resources & construction11.4%
Production & transportation38.0%

Employment type

Type%
Private sector97.4%
Government2.6%
Self-employed0.0%
Unpaid family workers0.0%

Commute

Method%
Drive alone76.9%
Carpool14.4%
Public transit0.0%
Walk0.0%
Work from home0.0%
Other means8.7%
Avg commute (minutes)52.3

Poverty

All people 2.7%
Under 18 years 0.0%
18 and over 4.4%
Married-couple families 0.0%
Female-led households 0.0%

Income support

Source% of households
Social Security7.1%
Retirement income17.1%
Supplemental Security0.0%
Cash public assistance0.0%
Food stamps / SNAP0.0%

Health indicators

Condition%
Obesity31.2%
High blood pressure28.4%
High cholesterol30.5%
Diabetes10.1%
Heart disease6.2%
Stroke2.8%
Asthma9.7%
Arthritis23.5%
Kidney disease2.9%
Pulmonary disease6.2%
Cancer6.6%
Behavior / access%
Smoking12.1%
Binge drinking19.5%
No physical activity19.4%
Less than 7 hrs sleep30.8%
Depression17.8%
Fair or poor health14.0%
Poor mental health14.0%
Poor physical health10.2%
No health insurance11.2%
Visited doctor (checkup)65.1%
Visited dentist68.6%
Cholesterol screening91.6%
Teeth loss9.3%

Veterans & disability

VeteransCount%
Civilian veterans5415.0%
Disability%
Any disability9.9%
Under 180.0%
18–64 years17.1%
65 and over0.0%

Health insurance coverage

Type%
Private insurance83.1%
Public insurance20.1%
No insurance11.5%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only46477.6%
Spanish51.1%
Other Indo-European51.1%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)51285.6%
Born in same state51285.6%
Born in different state41769.7%
Foreign born00.0%
Naturalized citizen8614.4%
Not a US citizen86100.0%

Ancestry

AncestryCount%
French14323.9%
Italian335.5%
AncestryCount%
Arab162.7%

Technology access

Metric% of households
Computer access35.3%
Internet access82.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 94548

What city is ZIP code 94548 in?

ZIP code 94548 is primarily assigned to Knightsen, California.

What county is ZIP code 94548 in?

ZIP code 94548 falls within Contra Costa County, California.

Is ZIP code 94548 family-oriented?

40% of residents in ZIP code 94548 are under 18, reflecting a younger, family-oriented community.

Does ZIP code 94548 have a large veteran population?

15% of civilians in ZIP code 94548 are veterans, above the national average of ~7%.

What is the median household income in ZIP code 94548?

The median household income in ZIP code 94548 is $166,597, above the national median of ~$75,000.

What is the typical home value in ZIP code 94548?

The median home value in ZIP code 94548 is $1,041,700.

What timezone is ZIP code 94548 in?

ZIP code 94548 observes the PST timezone.

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