| Locality | Post Code |
|---|---|
| Atlantic Mine, Houghton | 49905 |
| Calumet, Houghton | 49913 |
| Centennial Heights, Houghton | 49913 |
| Chassell, Houghton | 49916 |
| Copper City, Houghton | 49917 |
| Dodgeville, Houghton | 49921 |
| Dollar Bay, Houghton | 49922 |
| Gay, Houghton | 49945 |
| Hancock, Houghton | 49930 |
| Houghton, Houghton | 49931 |
| Hubbell, Houghton | 49934 |
| Kearsarge, Houghton | 49942 |
| Kenton, Houghton | 49967 |
| Lake Linden, Houghton | 49945 |
| Laurium, Houghton | 49913 |
| Nisula, Houghton | 49952 |
| Painesdale, Houghton | 49955 |
| Pelkie, Houghton | 49958 |
| Ripley, Houghton | 49930 |
| Sidnaw, Houghton | 49961 |
| South Range, Houghton | 49963 |
| Toivola, Houghton | 49965 |