🇺🇸 United States ZIP Code

STANDARD

91761

Ontario

ZIP Code 91761 is a standard zip code serving Ontario, Ontario, California (CA), in San Bernardino County, United States. It has an estimated population of 56,913 with a median household income of $60,971. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: San Bernardino
City: Ontario
Timezone: America/Los_Angeles

Coordinates

Latitude: 34.031600
Longitude: -117.618700

Geographic Details

Land Area: 29.17 mi²
Water Area: 0.01 mi²
Population Density: 1951.0 people per mi² (85th percentile)
Bounding Box: 34.067736°N, 33.983079°S, -117.524085°E, -117.654503°W

With 56,913 residents spread across 29.17 square miles, this area has a population density of 1951.0 people per square mile.

Demographics

56,913

Population

95th percentile

$60,971

Median Income

75th percentile

$269,500

Median Home Value

85th percentile

29.17 mi²

Land Area

The median household income in 91761 is $60,971, and the median home value is $269,500. This places the area in the top 25% nationally for household income.

Housing

16,038

Total Units

15,368

Occupied Units

95.8%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Ontario, CA.

91758

Ontario

91762

Ontario

91764

Ontario

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

95355

Modesto

$55,049

94533

Fairfield

$55,413

95987

Williams

$53,596

95694

Winters

$55,163

95469

Potter Valley

$52,902

94924

Bolinas

$63,750

91748

Rowland Heights

$62,517

95497

The Sea Ranch

$59,667

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.