Mackinac County, MI Zip Code Map

St. Ignace, Mackinac Island, Bois Blanc & Naubinway Zip Codes

Mackinac County, Michigan, encompasses several ZCTAs, each corresponding to specific regions within the county. The highest ZIP Code in the county is 49868, while the lowest is 49719. These ZCTAs cover various cities and towns, including St. Ignace, Mackinac Island, Cedarville, and Hessel.

According to the 2020 U.S. Census, the most populated ZIP Code in Mackinac County is 49781 (St. Ignace), with a population of approximately 3,628 residents. In contrast, the least populated is 49775 (Pointe Aux Pins), with around 44 residents.

Notable Landmarks

Mackinac Island (ZIP Code 49757): Renowned for its historic architecture and the absence of motor vehicles, offering a unique step back in time.
Mackinac Bridge (ZIP Code 49781): One of the world's longest suspension bridges, connecting Michigan's Upper and Lower Peninsulas.
Straits State Park (ZIP Code 49781): Provides picturesque views of the Mackinac Bridge and offers camping facilities.
Hiawatha National Forest (ZIP Code 49827): Encompasses parts of the county, offering vast recreational opportunities.

The county is served by multiple post offices, with ZIP Code 49757 designated as a PO Box-only area. The exact number of PO Boxes and post offices can vary, but key locations include St. Ignace, Mackinac Island, and Cedarville.

Demographic Data

Population: The county has a total population of approximately 10,834 residents.
Race: Predominantly White (72%), with Native American (15%), Black (4%), Asian (1%), and other races comprising the remainder.
Gender: The population is nearly evenly split between males (52%) and females (48%).
Income: The median household income is approximately $60,620, with a per capita income of $35,512.

Mackinac County, MI ZIP Codes (Highest to Lowest Population)

ZIP Code	City/Town	Population
49781	St. Ignace	3,628
49719	Cedarville	1,389
49827	Engadine	1,203
49745	Hessel	950
49757	Mackinac Island	836
49760	Moran	694
49762	Naubinway	577
49838	Gould City	391
49820	Curtis	200
49775	Pointe Aux Pins	44

Source: Population figures are based on the most recent data from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.

Source: Census
Map Copyright CCCARTO 2026

County/City Zip Codes