Map of Ontario, United States
Ontario is a city in California, United States, with a population of about 171,214. It lies at 34.0633°N, 117.6509°W, about 306 m above sea level. Ontario is about 3,641 km (2,262 mi) west of Washington, D.C., the capital. The nearest city on our map is Upland, 4 km to the north.
Ontario at a glance
Country
Region
California
Population
171,214GeoNames
Coordinates
34.0633, -117.650934°03′48″N 117°39′03″W
Time zone
America/Los_AngelesUTC−08:00 / UTC−07:00 (daylight saving time)
Local time
–
Elevation
306 m (1,004 ft)
Distance to Washington, D.C.
3,641 km (2,262 mi)
Where is Ontario?
- Located in the Northern and Western hemispheres.
- Daylight ranges from about 9 h 53 min on the shortest day to 14 h 26 min on the longest day (around 21 December and 21 June).
Cities near Ontario
- Upland — 4 km north
- Montclair — 4 km northwest
- Chino — 7 km southwest
- Rancho Cucamonga — 7 km northeast
- Pomona — 9 km west
- Chino Hills — 13 km southwest
- Eastvale — 14 km southeast
- San Dimas — 15 km west
- Diamond Bar — 15 km west
- Fontana — 20 km east
Largest cities in California
- Los Angeles — 3,820,914
- San Diego — 1,404,452
- San Jose — 997,368
- San Francisco — 827,526
- Fresno — 542,107
- Sacramento — 524,943
- Long Beach — 474,140
- Oakland — 419,267
- Bakersfield — 373,640
- Anaheim — 350,742
Largest cities in United States
- New York City — 8,804,190
- Los Angeles — 3,820,914
- Brooklyn — 2,736,074
- Chicago — 2,664,452
- Queens — 2,316,841
- Houston — 2,314,157
- Phoenix — 1,650,070
- Philadelphia — 1,573,916
- San Antonio — 1,526,656
- Manhattan — 1,487,536
Map of United States and all its cities →
Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.