What is the main zip code for Ontario, California?

91762 is the most populous Ontario ZIP code in Census data with about 62,990 residents.

What is the area code for Ontario, California?

Ontario, California uses area code 909.

What time zone is Ontario, California in?

Ontario, California is in the Pacific Time Zone.

Ontario, California Zip Codes

Q: How many zip codes does Ontario, California have?

Ontario, California has 5 zip codes in this directory: 3 standard delivery ZIPs and 2 PO Box or unique ZIPs.

Q: What county is Ontario, California in?

Ontario is in San Bernardino County, California.

📍 Ontario is in San Bernardino County, California with 5 zip codes; the most populous is 91762.

City

Ontario

County

San Bernardino

Zip Codes

Area Code

909

Ontario is a USPS city name in San Bernardino County, California with a Census population of approximately 180,138 across its ZIP codes. San Bernardino County as a whole has 121 ZIP codes in this directory. Below you'll find every zip code serving Ontario with population, income and home value, a map, and the city's affordability profile.

Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).

All Ontario Zip Codes

ZIP Code	City	County	Population	Median Income	Median Home	Details
91758	Ontario	PO Box ZIP	—	—	—	View →
91761	Ontario	San Bernardino	61,837	$89,041	$543,400	View →
91762	Ontario	San Bernardino	62,990	$74,245	$512,800	View →
91764	Ontario	San Bernardino	55,311	$71,336	$475,300	View →
91798	Ontario	PO Box ZIP	—	—	—	View →

Ontario at a Glance

Residents (ZIPs with data)

180,138

Median household income

$74,245

Median home value

$512,800

Price-to-income ratio

6.7

Median rent

$1,820

Owner-occupied

55%

Bachelor's degree+

19%

Poverty rate

13.2%

Ontario has 5 ZIP codes in this directory: 3 standard delivery ZIPs and 2 PO Box or unique ZIPs that carry no resident population in Census data. The 3 ZIPs with published Census housing data cover 180,138 residents, the largest being 91762 with 62,990 people.

The median ZIP in Ontario has a household income of $74,245 and a home value of $512,800, a price-to-income ratio of 6.7, in line with the 6.7 California ZIP median. The highest median income is in 91761 at $89,041. Median rent across these ZIPs is $1,820 a month.

55% of households in the typical Ontario ZIP own their home (statewide ZIP median 64%). 19% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 13.2%, above the 10.8% statewide ZIP median. Overall density is about 3,553 residents per square mile across 51 square miles of ZIP land area.

Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.