Sumas city, Washington
Official LSAD Designation: Sumas city • Census GEOID: 5368330
• Whatcom County
Sumas city is an incorporated city in Whatcom County, Washington. According to official records from the Census (2025), Sumas city had an estimated population of 1,672 residents. Official Census Bureau geographic records classify this community under LSAD designation Sumas city (GEOID 5368330).
Local Government Administration U.S. Census Bureau GMAF
City Of Sumas
Municipal
Official Title:
Deputy Clerk-treasurer
Address:
PO BOX 9, SUMAS WA 98295-0009
County Of Whatcom
County
Official Title:
County Executive
Address:
311 GRAND AVE, STE 108, BELLINGHAM WA 98225-4038
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 1,672 | 2025 |
| Median Household Income | $89,375 | 2020-2024 |
| Median Home Value | $441,500 | 2020-2024 |
| Land Area | 1.47 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).