The following is a list of Michigan State Historic Sites in Alger County, Michigan. Sites marked with a dagger (†) are also listed on the National Register of Historic Places in Alger County, Michigan.__TOC__
| width="30%" | Name | width="100px" | Image | Location | width="125px" | City | width="125px" | Listing date | |
|---|---|---|---|---|---|---|---|---|---|
| Alger County Courthouse (Demolished) | Elm Street | Munising | |||||||
| American Fur Company Log Cabin No. 3 | Elm and Varnum Streets | Munising | |||||||
| Au Sable Light Station† | Au Sable Point, west of Grand Marais | Burt Township | |||||||
| Bay Furnace† | Northwest of Christmas off M-28 in Hiawatha National Forest (Sec 29, T47N, R19W) | Christmas | |||||||
| Bird-Olivier House | Everett Avenue and Emma Street | Grand Marais | |||||||
| Burt and Gamble Railway Grade | east of Grand Marais | Grand Marais | |||||||
| Curtis and Miller Cook Sawmill | East Everett Road (H-58) | Grand Marais | |||||||
| First National Bank and Post Office | 100 West Munising Avenue | Munising | |||||||
| Grand Island | Munising Bay, Lake Superior | Munising | |||||||
| Grand Marais Informational Designation | Bay Shore Park, Au Sable Point | Grand Marais | |||||||
| Grand Marais Post Office Building | Grand Marais Avenue at Randolph Street | Grand Marais | |||||||
| Hill's Store (demolished) | Grand Marais Avenue | Grand Marais | |||||||
| Lake Superior Informational Designation | Roadside Park on M-28, west of Munising | Au Train Township | |||||||
| Lobb House† | 203 West Onota Street | Munising | |||||||
| Mikulich General Store† | Corner of county roads H-01 and H-44 | Traunik | |||||||
| Pacific Hotel | 100 Rock River Road (M-94) | Chatham | |||||||
| Paulson House† | South of Au Train on USFS Road 2278 in Hiawatha National Forest (Sec. 6, T46N, R20W) | Au Train Township | |||||||
| Pictured Rocks | Lake Superior, east of Munising | Munising | |||||||
| Tyoga Historical Pathway Informational Designation | Just north of the Village of Deerton | Deerton |