About Ontario County
Ontario County is a city located in United States, in the New York region. According to the latest available data (2026), the population of Ontario County is approximately 112,458 residents, making it the #745 most populous city in United States.
Globally, Ontario County ranks #14,212 among the world's most populated cities.
Ontario County City Statistics
| City | Ontario County |
| Country |  United States |
| Population | 112,458 |
| Global Rank | #14,212 |
| Rank in United States | #745 of 867 cities |
| City Category | city |
| Region | New York |
| Latitude | 42.85 |
| Longitude | -77.29 |
| Data Year | 2026 |
Where is Ontario County Located?
Ontario County is located in United States, in the New York region, at coordinates 42.85° latitude and -77.29° longitude. Located in the mid-latitudes, Ontario County experiences distinct four-season weather patterns.
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 County?
The population of Ontario County is approximately 112,458 residents according to the latest available data (2026).
Where is Ontario County located?
Ontario County is located in United States at approximately 42.85° latitude and -77.29° longitude.
Is Ontario County one of the largest cities in United States?
With a population of 112,458, Ontario County is one of the notable urban areas in United States. It ranks #745 out of 867 cities in the country.
