Ontario at a Glance
Sources: U.S. Census Bureau (ACS 5-year) · Wikipedia / Wikidata · OpenStreetMap. Latest published figures for Ontario.
About Ontario, California
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 Greater Los Angeles 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 On…
Summary via Wikipedia.
Weather in Ontario Right Now
Live weather data from Open-Meteo. Local climate affects biohazard cleanup needs year-round.
Why Local Data Matters
Understanding Ontario's layout, climate, and community helps homeowners plan ahead. Ontario Unattended Death Cleanup uses this local knowledge to deliver biohazard cleanup that fits the real conditions of the area.
Explore our Ontario area guide, coverage map, and things to do for more local insight.