| City: | Amboy, California |
| City Alias: | Cadiz |
| County: | San Bernardino County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 9:41:23 AM |
| Population: | 17 [See All] |
| Area Code: | 442 |
| Classification: | PO Box |
| Coordinates: | 34.6867, -115.8741 |
| Land Area: | 47.673 sq mi |
| Quick Link: |
Amboy sits along National Trails Highway in the vast Mojave Desert of San Bernardino County, California. This ZIP code covers 471 square miles of desert territory with just 17 permanent residents and 7 occupied homes. The population is outnumbered by employment: 34 jobs across 5 business establishments serve travelers and maintain infrastructure along the historic route.
National Trails Highway follows the path of historic Route 66, and Amboy survives as one of California's last intact highway communities from that era. The post office handles minimal local mail service with just 1 PO Box, though it also maintains a city carrier route for the scattered addresses along the highway corridor.
This isn't a PO Box Only Zone. Street delivery exists for the handful of addresses, but most residents and businesses rely on direct addressing along National Trails Highway. The tiny permanent population (median age 34.8) contrasts with the transient nature of a desert highway stop.
Mail addressed to Amboy can also use CADIZ as an acceptable city name, both serving this remote corner of the Mojave where distances are measured in hours rather than miles.
The single street in ZIP+4 data is National Trails Highway, the modern name for historic Route 66.
ZIP Code 92304 has 17 residents and 7 households (average 2.43 persons per household). The median age is 34.8 years, slightly younger than the state (37.5) and younger than the nation (38.8). The gender split is 82.4% male and 17.6% female, which is much higher than the national male share (49.1%), making this a male-majority area. Largest groups are Hispanic or Latino (52.9%) and Other / Two or More Races (47.1%, much higher than the state average of 21.2% and well above the national average of 8.4%); Hispanic or Latino residents make up 52.9%, which is much higher than the national average (18.7%), and Other / Two or More Races share is much higher than both the state (21.2%) and national averages (8.4%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 17Source: Census DHC |
| 2024 ACS Population Estimate: | 0Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 0.4 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 7Source: Census DHC |
| Average House Value: | $666,666,666Source: Census ACS |
| Persons Per Household: | 2.43Source: Census DHC |
| Average Family Size: | 2.13Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 38 | 47 | 17 | 17 | 23 | 21 | 23 | 21 | 23 | 7 | 0 | 0 | 0 | 0 |
| Decennial Census | 17 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 17 | -- | -- | -- | -- |
Median Age: 34.8
Male Median Age: 34.3
Female Median Age: 66.3
| 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 | 2 | 0 | 0 | 0 | 0 | 4 | 3 | 0 | 0 | 1 | 0 | 1 | 3 | 0 | 0 | 0 | 0 | 0 |
| Female | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
| Total | 2 | 0 | 0 | 0 | 0 | 4 | 3 | 1 | 0 | 1 | 0 | 1 | 3 | 2 | 0 | 0 | 0 | 0 |
| White: | 6 | 25.00% |
| Black: | 0 | 0% |
| Hispanic:* | 9 | 37.50% |
| Asian: | 1 | 4.17% |
| American Indian: | 0 | 0% |
| Hawaiian: | 0 | 0% |
| Other: | 8 | 33.33% |
| Total: | 24 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 14 | 82.35% | 34.3 years |
| Females: | 3 | 17.65% | 66.3 years |
| Total: | 17 | 100% | 34.8 years |
| Native, born in the United States: | 0 | 0% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0% |
| Foreign born, naturalized U.S. citizen: | 0 | 0% |
| Foreign born, not a U.S. citizen: | 0 | 0% |
| Total Population: | 0 | 100% |
| Total Native Population: | 0 | 0% |
| Total Foreign-born Population: | 0 | 0% |
In 2024, -666,666,666.00% of adults (25+) have a bachelor's degree or higher, which is far lower than the national rate (35.70%). High school or higher is -666,666,666.00%, which is far lower than the national rate (89.60%). The uninsured rate is -666,666,666.00%, which is far lower than the national rate (8.40%). Private coverage is -666,666,666.00%, which is far lower than the national rate (67.10%). Public coverage is -666,666,666.00%, which is far lower than the national rate (36.70%). The share of people in poverty is -666,666,666.00%, which is far lower than the national rate (8.80%). Poverty has been broadly stable, which may reflect structural barriers or offsetting gains and setbacks. Insufficient data for school enrollment.
Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment
| Less than 9th grade: | 0 | 0% |
| 9th to 12th grade, no diploma: | 0 | 0% |
| High school graduate (includes equivalency): | 0 | 0% |
| Some college, no degree: | 0 | 0% |
| Associate's degree: | 0 | 0% |
| Bachelor's degree: | 0 | 0% |
| Graduate or professional degree: | 0 | 0% |
| Total: | 0 | 100% |
| High school or higher: | 0 | 0% |
| Bachelor's degree or higher: | 0 | 0% |
| Private Insurance: | 0 | 0% |
| Public Insurance: | 0 | 0% |
| No Insurance: | 0 | 0% |
| Total: | 0 | 100% |
| Has Health Insurance: | 0 | 0% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 0.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
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.
| Nursery School, Preschool: | 0 | 0% |
| Kindergarten: | 0 | 0% |
| Elementary school (grades 1-8): | 0 | 0% |
| High school (grades 9-12): | 0 | 0% |
| College or graduate school: | 0 | 0% |
| Total: | 0 | 100% |
| Early Childhood: | 0 | 0% |
| K-12 (Primary & Secondary School): | 0 | 0% |
ZIP Code 92304 supports both business and residential activity. According to the Business Census (2024), there are 5 business establishments, employing about 35 people with an annual payroll of $2,151,000. USPS data shows 0 residential mailboxes and 2 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 2Source: USPS |
| Total Delivery Receptacles: | 8,549Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 5Source: CBP |
| 1st Quarter Payroll: | $552,000Source: CBP |
| Annual Payroll: | $2,151,000Source: CBP |
| # of Employees: | 35Source: CBP |
ZIP Code 92304 is located in San Bernardino County, California, within the Riverside-San Bernardino-Ontario, CA Metropolitan Statistical Area (CBSA 40140) and California's 23rd Congressional District. This Metro area has a population of 4,224,851 people, about 0.00% of whom live in ZIP Code 92304. It covers 47.673 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Riverside-San Bernardino-Ontario, CASource: Census |
| CBSA Number: | 40140Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 4,224,851Source: Census |
| MSA: | Los Angeles-Riverside-Orange County, CASource: Census |
| Land Area: | 47.673 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 23Source: USPS |
| Congressional Land Area: | 9898 sq miSource: Census |
| PMSA: | Riverside-San Bernardino, CA PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 92304 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.