What kinds of homes are in Ontario, CA?

Name: Types of homes in Ontario, CA, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Ontario, CA has 55,966 (±979) homes (2020–2024 American Community Survey).

That is about 1,120 homes per square mile of land.

57.9% are detached single-family houses.

9.3% are in buildings of two to four units.

19.8% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 55,966 (±979)
Detached houses: 57.9%
2–4 unit buildings: 9.3%
5+ unit buildings: 19.8%

Homes in Ontario by building size

Housing units by units in structure, 2020–2024
Building type	Ontario	San Bernardino County	California	United States
Single-family, detached	57.9% (±1.4 points)	70.0%	57.0%	61.3%
Single-family, attached (townhouse, rowhouse)	8.9% (±1.1 points)	4.6%	7.4%	6.2%
2 units	2.1% (±0.6 points)	1.8%	2.4%	3.4%
3 or 4 units	7.2% (±0.9 points)	4.6%	5.4%	4.3%
5 to 9 units	3.9% (±0.6 points)	3.3%	5.7%	4.5%
10 to 19 units	3.8% (±0.8 points)	2.3%	4.9%	4.3%
20 or more units	12.1% (±1.3 points)	7.9%	13.6%	10.3%
Mobile home	4.0% (±0.7 points)	5.4%	3.5%	5.6%
Boat, RV, van, etc.	0.0% (±0.1 points)	0.1%	0.1%	0.1%

In Ontario, the share of homes in buildings of five or more units is higher than in San Bernardino County (13.5%).

It is also lower than in California (24.2%).

It is not measurably different from the national figure (19.1%).

Homes in buildings of 5 or more units in places near Ontario

Nearest places with a published estimate, compared with Ontario
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Ontario	—	19.8% (±1.6 points)	—
Chino	5.1 mi	14.5% (±2.2 points)	Lower
Eastvale	5.3 mi	3.8% (±1.5 points)	Lower
Montclair	5.8 mi	18.1% (±3.1 points)	Not measurably different
Upland	6.3 mi	21.0% (±2.2 points)	Not measurably different
Rancho Cucamonga	6.8 mi	21.5% (±1.6 points)	Not measurably different
Jurupa Valley	8.2 mi	8.7% (±1.0 points)	Lower
Norco	8.3 mi	3.0% (±1.3 points)	Lower
Claremont	8.7 mi	16.3% (±3.4 points)	Not measurably different

Nearby places with a measurably lower figure: Chino, CA (14.5%), Eastvale, CA (3.8%), Jurupa Valley, CA (8.7%).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Homes in buildings of 5 or more units across San Bernardino County, place by place

Rank	Place	Homes in buildings of 5 or more units
1	Loma Linda	29.7% (±4.9 points)
2	Colton	25.1% (±3.3 points)
3	San Bernardino	22.3% (±1.5 points)
4	Rancho Cucamonga	21.5% (±1.6 points)
5	Redlands	21.2% (±2.6 points)
6	Upland	21.0% (±2.2 points)
7	Ontario	19.8% (±1.6 points)
8	Grand Terrace	18.5% (±6.0 points)
9	Montclair	18.1% (±3.1 points)
10	Rialto	14.6% (±1.9 points)
11	Chino	14.5% (±2.2 points)
12	Fontana	13.9% (±1.2 points)
13	Highland	12.9% (±2.2 points)

Showing 13 of 47 places in San Bernardino County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates).

Margins of error are at the 90% confidence level.

What you can do on Seayora in Ontario

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Questions about Ontario

How many homes are in Ontario?

Ontario, CA has an estimated 55,966 (±979) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Ontario houses or apartments?

57.9% are detached houses and 8.9% attached houses, while 29.1% are in buildings of two or more units.

How many two-family and small multifamily homes are in Ontario?

9.3% of homes in Ontario are in buildings of two to four units, the small rental buildings that are often owner-occupied.

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Ontario city, California

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for Ontario city, California (place:53896, in state:06).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The API needs a free key.

Request a Census API key.

DP04_0001E, DP04_0001M, DP04_0007PE, DP04_0007PM, DP04_0008PE, DP04_0008PM, DP04_0009PE, DP04_0009PM, DP04_0010PE, DP04_0010PM, DP04_0011PE, DP04_0011PM, DP04_0012PE, DP04_0012PM, DP04_0013PE, DP04_0013PM, DP04_0014PE, DP04_0014PM, DP04_0015PE, DP04_0015PM

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.