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Ontario Mind Meld: 19 Questions to test your cognitive skills

Updated: Mar 17, 2023

Ontario is a city in southwestern San Bernardino County in the U.S. state of California, 35 miles (56 km) east of downtown Los Angeles and 23 miles (37 km) west of downtown San Bernardino, the county seat.

Think you know everything there is to know about Ontario? Put your knowledge to the test with this comprehensive quiz! Featuring 19 questions on a variety of topics, it's the ultimate test of your expertise. Find out your true potential.

What was the population of Ontario in 2020, given that it was 163,924 in 2010?

  • 269,908

  • 303,208

  • 164,749

  • 175,265