Mackay city, Idaho
Official LSAD Designation: Mackay city • Census GEOID: 1649240
• Custer County
Mackay city is an incorporated city in Custer County, Idaho. According to official records from the Census (2025), Mackay city had an estimated population of 480 residents. Official Census Bureau geographic records classify this community under LSAD designation Mackay city (GEOID 1649240).
Local Government Administration U.S. Census Bureau GMAF
City Of Mackay
Municipal
Official Title:
City Clerk
Address:
PO BOX 509, MACKAY ID 83251-0509
County Of Custer
County
Official Title:
Clerk
Address:
PO BOX 385, CHALLIS ID 83226-0385
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 480 | 2025 |
| Median Household Income | $43,897 | 2020-2024 |
| Median Home Value | $279,500 | 2020-2024 |
| Land Area | 0.87 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).