Ontario, CA population, income and ZIP codes

Ontario city is a mid-size city in California, with 178,347 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #25 of 1,618 ranked by population — larger than 98% of them. The median age here is 33.1 years against 39.1 nationally, a distinctly younger profile, typical of places with students, military posts or a fast-growing family population. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.

Households in Ontario city earn a median of $82,806 a year, 5.4% above the national figure of $78,538 and 9% below the $91,111 median for the 1,050 California cities we cover. Median household income counts every pre-tax dollar arriving at an address — wages, self-employment, Social Security, pensions, interest and public assistance — for everyone living there, so multi-earner households pull the figure up even where individual pay is modest. Poverty reaches 12.7% of residents here, above the 12.4% national rate.

The typical owner-occupied home in Ontario city is valued at $568,000, 87.2% above the national figure and 4% below the $589,600 peer median, while median gross rent runs $1,916 a month, 36.3% above the national figure, or roughly $22,992 across a full year. A household on the local median income would put about 27.8% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 6.9×, against roughly 3.9× nationally, so buying is out of reach on local earnings alone and the ownership market leans on outside income, equity or dual high earners. 57.3% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

Home values sit at 6.9× median household income, far past the 3.9× national mark, so ownership costs here are set by something other than local wages — second homes, retirees with equity, or commuters earning elsewhere. Median income runs above the national figure while poverty also runs above it — a split distribution, not a uniformly comfortable place. Averages hide that; the two numbers together do not.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.