Ontario, CA ZIP codes
Ontario, California has 4 ZIP codes, including 1 PO Box ZIP. They are in San Bernardino County.
- Population in these ZIPs
- 183,440
- Avg. median income
- $88,900population-weighted
- Typical home value
- $661,400population-weighted
- Metro area
- Riverside-San Bernardino-Ontario, CA
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Ontario, CA ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 91758 PO Box | San Bernardino County | — | — | — |
| 91761 | San Bernardino County | 62,935 | $100,578 | $679,100 |
| 91762 | San Bernardino County | 64,235 | $83,850 | $673,700 |
| 91764 | San Bernardino County | 56,270 | $81,762 | $627,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Ontario
Frequently asked questions
What county is Ontario, California in?
Ontario ZIP codes are in San Bernardino County.
Which Ontario ZIP codes are PO Boxes?
91758 is a PO Box or single-organization ZIP code; it has no residential delivery area.