Ontario
City in San Bernardino County, California
Ontario is a city in San Bernardino County, California, with 175,265 residents (2020 Census). It sits at 1,004 ft (306 m) above sea level. The nearest town is Eastvale, 5.3 miles S.
- 175,265residents (2020 Census)
- 1,004 ftelevation · 306 m
- 50.0 sq miland area · 129.5 km²
- 3,506 / sq mipopulation density
- 91761main ZIP code (5 in total)
About Ontario
Ontario is a city in southwestern San Bernardino County, California, United States, 35 miles (56 km) east of downtown Los Angeles and 23 miles (37 km) west of downtown San Bernardino, the county seat. Located in the western part of the Inland Empire metropolitan area, it lies just east of Los Angeles County and is part of the Los Angeles metropolitan area. As of the 2020 census, the city had a population of 175,265.
The city is home to Ontario International Airport, which is the 8th-busiest airport in the United States by cargo carried, as of 2026. Ontario handles the mass of freight traffic between the ports of Los Angeles and Long Beach and the rest of the country.
It takes its name from the Ontario Model Colony development established in 1882 by the Canadian engineer George Chaffey and his brothers, William Chaffey and Charles Chaffey. They named the settlement after their home province of Ontario, Canada's most populous province.
Text: Wikipedia · CC BY-SA 4.0
Ontario weather: 7-day forecast
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Living in Ontario
- Median household income
- $88,941
- Median home value
- $607,600
- Median rent
- $2,030/mo
- Median age
- 33.5
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Map of Ontario
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Open in Google Maps ›Ontario, CA population
Ontario had 175,265 residents in the 2020 Census.
| 2020 Census | 175,265 |
|---|---|
| Density | 3,506 per sq mi (1,354 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Ontario at a glance
| State | California (CA) |
|---|---|
| County | San Bernardino County |
| Type | City |
| Population | 175,265 (2020) |
| Land area | 49.98 sq mi (129.5 km²) |
| Water area | 0.03 sq mi (0.08 km²) |
| Elevation | 1,004 ft (306 m) |
| Coordinates | 34.0370° N, 117.6060° W |
| ZIP codes | 91761, 91710, 91730, 91762, 91764 |
| Census code (GEOID) | 0653896 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Ontario
- Eastvale5.3 mi S
- Chino5.7 mi SW
- Montclair5.8 mi NW
- Upland6.3 mi NW
- Rancho Cucamonga6.8 mi N
- Jurupa Valley8.3 mi E
- Norco8.3 mi S
- Claremont8.7 mi NW
- San Antonio Heights8.8 mi N
- Pomona9.0 mi W
- Chino Hills9.3 mi SW
- Fontana9.6 mi NE
Straight-line distance between town centers.
Frequently asked questions about Ontario
What county is Ontario in?
Ontario is in San Bernardino County, California.
What is the population of Ontario, CA?
175,265 people lived in Ontario at the 2020 Census.
What is the ZIP code of Ontario, CA?
The main ZIP code is 91761. Other ZIP codes: 91710, 91730, 91762, 91764.
What is the elevation of Ontario?
1,004 feet (306 m) above sea level.
What towns are near Ontario?
Eastvale (5.3 mi), Chino (5.7 mi), Montclair (5.8 mi), Upland (6.3 mi), Rancho Cucamonga (6.8 mi).
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