Zip Code 49781 — Saint Ignace, MI
49781 is a ZIP Code associated with Saint Ignace, MI, located within Mackinac. 49781 ranks #1 out of 10 ZIP codes in Mackinac County by population (and #520 out of 992 in MI). The area supports an estimated population of 4,156 residents across Data Pending housing units, with a population density of 19.7 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (45.952720, -84.776520)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 49781 |
| Primary City | Saint Ignace |
| State / Province | MI |
| County | Mackinac |
| Total Population | 4,156 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 19.7 people/sq mi |
| Timezone | America/Detroit |
How 49781 Compares
| Metric | ZIP 49781 | Mackinac County | MI State Average |
|---|
| Population | 4,156 | 9,945 (Total) | 10,077,716 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 19.7 /sq mi | -- | -- |
| County Pop Rank | #1 of 10 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →