Ontario, CA Population

Overview

175,223

Total Population

32.6

Median age

50.46%

Female population %

98.2:100

Gender ratio (M:F)

25-29 years

Largest age group

44.7

Total dependency ratio

White

Largest racial group

122,416

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Ontario's population is young compared to the rest of the country:

The median age in Ontario is 32.6, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Ontario's population under 18 was 25.52%, compared to the 22.51% nationwide.
Ontario's elderly or the senior population (over 65 age) was 9.82% as compared to 16.04% nationwide.
Of the total population in Ontario, 21.09% were under the age of 15, 24.08% aged 15 to 29, 45.00% aged 30 to 64, 8.93% aged 65 to 84, and 0.90% were 85 years of age and older.

There are 1,625 more females than males in Ontario:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.46% females and 49.54% males in Ontario, CA.
The Ontario, CA gender ratio is 98.2:100 i.e. 98.2 men to 100 women (0.982).
For male population, the largest age group is 30-34 years with a population of 7,713.
For the female population, the largest age group is 25-29 years with a population of 8,261.

Ontario's population has become increasingly diverse:

Racial distribution of Ontario population: 40.92% are White, 5.66% are Black or African American, 1.41% are American Indian and Alaska Native, 6.98% are Asian, 0.30% are Native Hawaiian and other Pacific Islander, 26.70% are some other race and 18.02% are multiracial.
Ontario's racial breakdown clearly shows that there is no majority of any race in the city.
By ethnicity, 122,416 is Hispanic or Latino (of any race), and 52,807 (30.14% of the total population) is Non-Hispanic.
The largest racial group in Ontario is White with a population of 71,709 (40.92% of the total population).

Ontario's population has already reached its peak and is showing a trend of decline:

The peak population was 181,636 in the year 2019
From 2000 to 2010, Ontario's population increased by 5,711 (3.60%), as compared to the national growth of 9.63%.
From 2010 to 2020, Ontario's population increased by 11,472 (6.98%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Ontario's population was lowest in year 2000 at 158,669.