ZIP Code 49757 — Mackinac Island, MI
49757 is a standard (street delivery) ZIP code serving Mackinac Island, Michigan, in Mackinac County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 49757 at a glance
| ZIP code | 49757 |
|---|---|
| Primary city | Mackinac Island |
| State | Michigan (MI) |
| County | Mackinac FIPS 26097 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 561 |
| Coordinates | 45.859330, -84.625330 |
How ZIP+4 works in 49757
The four digits after the hyphen encode a delivery segment inside 49757. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 49757 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 49757.
| ZIP | City | Distance |
|---|---|---|
| 49701 | Mackinaw City, MI | 9.3 mi |
| 49781 | Saint Ignace, MI | 9.7 mi |
| 49775 | Pointe Aux Pins, MI | 10 mi |
| 49718 | Carp Lake, MI | 13.5 mi |
| 49745 | Hessel, MI | 14.2 mi |
| 49755 | Levering, MI | 17.5 mi |
| 49760 | Moran, MI | 18.6 mi |
| 49719 | Cedarville, MI | 19 mi |
| 49721 | Cheboygan, MI | 21.4 mi |
| 49769 | Pellston, MI | 23 mi |
| 49780 | Rudyard, MI | 24.3 mi |
| 49716 | Brutus, MI | 24.9 mi |
Questions about 49757
What is the ZIP+4 code for 49757?
49757 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 49757, you need to look up a specific street address to get them.
What city is 49757?
49757 is assigned to Mackinac Island, Michigan, in Mackinac County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.