Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/CA/ONTARIO

Ontario ZIP codes, California

Ontario, CA has 4 ZIP codes (91761, 91762, 91764 and 91758) and area codes 909 and 840. The largest is 91761.

USPS city name
4 ZIP codes
Overlapping the city
2 more
Population
180,547
Area codes
909, 840

Mail addressed to Ontario uses the ZIP codes above. 2 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Ontario in numbers

About 180,547 people live in Ontario, in 53,770 households, the 25th-largest of California's 1,568 census places. The median household income is $88,941 a year, 10% below the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $607,600 (17% below the California median), and median gross rent is $2,030 a month. The median age is 33.5; 22.5% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 32 minutes.

Population180,547Ontario180,547
Households53,770Ontario53,770
Median age33.5Ontario33.5California37.9US 38.9
Median household income$88,941Ontario$88,941California$99,122US $80,734
Median home value$607,600Ontario$607,600California$734,700US $332,700
Median gross rent$2,030Ontario$2,030California$2,036US $1,413
Bachelor's degree or higher22.5%Ontario22.5%California37.1%US 35.7%
Mean commute31.5 minOntario31.5 minCalifornia28.7 minUS 26.4 min
Population density3,612 / sq miOntario3,612 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Ontario city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Ontario

ZIP codes with the USPS city name Ontario
ZIP City Type Population Median income Median home
91761 Ontario , CA Standard 62,935 $100,578 $635,000
91762 Ontario , CA Standard 64,235 $83,850 $606,000
91764 Ontario , CA Standard 56,270 $81,762 $565,800
91758 Ontario , CA No street area — — —

Other ZIP codes overlapping Ontario

These ZIP codes cover part of Ontario but are addressed as somewhere else.

ZIP codes overlapping Ontario
ZIP City Type Population Median income Median home
91710 Chino , CA Standard 78,754 $103,085 $686,500
91786 Upland , CA Standard 55,829 $92,458 $641,600

Map of Ontario ZIP codes

91761917629176491758

The ZIP codes of Ontario, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Ontario

The nearest larger towns are Fontana (214,169 people, 9.5 mi), Riverside (319,069 people, 14 mi) and Anaheim (344,521 people, 15 mi).

Towns near Ontario
TownPopulationDistance
Chino 92,652 5.1 mi
Eastvale 70,633 5.3 mi
Montclair 37,810 5.8 mi
Upland 79,257 6.3 mi
Rancho Cucamonga 175,411 6.8 mi
Jurupa Valley 107,011 8.2 mi
Norco 25,054 8.3 mi
Claremont 36,595 8.7 mi
San Antonio Heights 3,458 8.8 mi
Pomona 147,943 9.1 mi
Fontana 214,169 9.5 mi
Chino Hills 77,927 9.5 mi
La Verne 30,600 11.1 mi
Coronita 2,763 11.2 mi

More nearby: every ZIP code in San Bernardino County · California ZIP codes

Cite this page

zipcodes.pro. “Ontario, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/ontario

Underlying data is public domain or openly licensed — sources, vintages and licences.