Ontario city, Oregon
Official LSAD Designation: Ontario city • Census GEOID: 4154900
• Malheur County
Ontario city is an incorporated city in Malheur County, Oregon. According to official records from the Census (2025), Ontario city had an estimated population of 11,957 residents. Official Census Bureau geographic records classify this community under LSAD designation Ontario city (GEOID 4154900).
Local Government Administration U.S. Census Bureau GMAF
City Of Ontario
Municipal
Official Title:
Mayor
Address:
444 SW 4TH ST, ONTARIO OR 97914-3497
County Of Malheur
County
Official Title:
County Judge
Address:
251 B ST W, STE 5, VALE OR 97918-1375
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 11,957 | 2025 |
| Median Household Income | $46,308 | 2020-2024 |
| Median Home Value | $236,300 | 2020-2024 |
| Land Area | 5.98 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).