About Ontario
Ontario is a city located in United States, in the California region. According to the latest available data (2026), the population of Ontario is approximately 175,265 residents, making it the #458 most populous city in United States.
Globally, Ontario ranks #9,854 among the world's most populated cities.
Ontario City Statistics
| City | Ontario |
| Country |  United States |
| Population | 175,265 |
| Global Rank | #9,854 |
| Rank in United States | #458 of 867 cities |
| City Category | city |
| Region | California |
| Latitude | 34.0528 |
| Longitude | -117.6278 |
| Data Year | 2026 |
Where is Ontario Located?
Ontario is located in United States, in the California region, at coordinates 34.0528° latitude and -117.6278° longitude. Ontario sits in the subtropics, typically enjoying warm temperatures year-round.
Nearby Cities
Other Cities in United States
Largest Cities in United States
| # | City | Population |
|---|---|---|
| 1 | Harris County | 4,731,145 |
| 2 | Los Angeles | 3,898,747 |
| 3 | San Diego County | 3,298,634 |
| 4 | Brooklyn | 2,736,074 |
| 5 | Miami-Dade County | 2,701,767 |
Frequently Asked Questions
What is the population of Ontario?
The population of Ontario is approximately 175,265 residents according to the latest available data (2026).
Where is Ontario located?
Ontario is located in United States at approximately 34.0528° latitude and -117.6278° longitude.
Is Ontario one of the largest cities in United States?
With a population of 175,265, Ontario is one of the notable urban areas in United States. It ranks #458 out of 867 cities in the country.
