Statistic Ontario California National
Population 185,250 40,994,941 336,919,644
Population density (sq mi) 3,710 263 91
Median age 32.3 36.0 37.7
Male/Female ratio 1.0:1 1.0:1 1.0:1
Married (15yrs & older) 49% 52% 55%
Families w/ Kids under 18 45% 46% 43%
Speak English 44% 56% 79%
Speak Spanish 50% 29% 13%
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Overview of Ontario Demographics

The population in Ontario is 185,250, while the population density is 3,710 people per square mile, contrasting with the national average of 91. The median age stands at 32.3, with 49% of individuals aged 15 or older being married and 45% having children under 18. In terms of household income equality in Ontario, 16% of households report a median income below $25,000, while 19% report an income exceeding $150,000. The Ontario demographics data can provide invaluable insight into the composition, dynamics and needs of urban and rural areas, enabling planners, developers and policymakers to strategize effectively for the promotion of prosperity, equity and well-being for all residents in the area.

Ontario Racial Demographics & Ethnicity

The Ontario racial demographics and ethnicity breakdown serves as a critical tool for understanding and addressing systemic inequities, promoting social justice and inclusion and building stronger, more resilient communities. The racial breakdown in Ontario is 46.8% White, 5.8% Black or African American, 6.3% Asian, 1% American Indian and 0.3% Native Hawaiian - 70% of the population identify as Hispanic or Latino. Of all households, 44.4% reported speaking English only, while 49.5% reported speaking Spanish only. A total of 26.8% of residents were considered foreign born.

Ontario Population Density

High population density areas typically offer a diverse array of amenities and services within walking distance or a short commute, enriching residents' quality of life and well-being. Accessible healthcare facilities, educational institutions, cultural venues, restaurants, shopping and public transportation options contribute to the convenience and vibrancy of these communities. The population density of of Ontario is 3,710 people per square mile, which far exceeds the national average of 91 and ranks among the most densely populated cities in the nation.

Why are Demographics Important?

Social Cohesion: The analysis and understanding of demographics are essential for promoting social cohesion and fostering appreciation among diverse communities. By embracing and acknowledging differences in Ontario demographics, societies can promote inclusivity, diversity and social harmony while addressing social inequalities and advocating for equal opportunities. Racial demographics can reflect the diversity within a population and are instrumental in fostering inclusive and welcoming communities. Embracing ethnic diversity strengthens social connections, promotes cultural understanding and enriches society by celebrating the contributions of individuals from diverse racial and ethnic backgrounds.

Education Allocation: In education planning, Ontario demographic data can be invaluable for identifying student demographics, school enrollment trends and educational needs. This data aids schools and policymakers in resource allocation and the formulation of effective educational programs. It serves as a crucial tool for recognizing disparities in educational access and outcomes among different demographic groups, including racial and ethnic minorities, socio-economic status and students with disabilities. Through the disaggregation of data by demographic factors, education planners can pinpoint areas of inequity and implement targeted interventions to enhance access, support, and outcomes for marginalized students. Overall, Ontario demographic data can be an essential tool in education for promoting equity, facilitating student success, and nurturing inclusive learning environments that cater to the needs of all students.

Understanding Populations: Reporting and analyzing the demographic data in Ontario can allow us to gain insights into the characteristics and composition of populations, including age, gender, race, ethnicity, income, education and other socio-economic factors. This understanding is essential for addressing the diverse needs, preferences and challenges of different demographic groups within communities. Demographics can play a crucial role in understanding populations, informing decision-making processes and promoting equity, inclusion, and well-being for all individuals and communities. Ontario population data serves as a foundation for addressing social, economic, and environmental challenges and promoting the well-being and resilience of societies.

Demographics Quick Facts

  • The population density in Ontario is 1310% higher than California
  • The median age in Ontario is 10% lower than California
  • In Ontario 46.77% of the population is White
  • In Ontario 5.76% of the population is Black
  • In Ontario 6.27% of the population is Asian

Compare Ontario, CA Demographics

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      Ontario racial demographics

      Race Ontario California National
      White 46.77% 61.26% 73.35%
      Black 5.76% 5.85% 12.63%
      Asian 6.27% 13.85% 5.22%
      American Indian 0.95% 0.74% 0.82%
      Native Hawaiian 0.33% 0.39% 0.18%
      Mixed race 12.56% 4.62% 3.06%
      Other race 27.36% 13.28% 4.75%
      In Ontario, 70.0% of people are of Hispanic or Latino origin.
      Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

      Household income distribution

      Place of birth by citizenship

      Ontario age breakdown

      Marital status

      Age of children in married couples

      Source: The Ontario, CA demographics data displayed above is derived from the United States Census Bureau American Community Survey (ACS) and include 2026 modeled data developed using proprietary methodologies.