Frequently Requested Phone Numbers
| City Departments | Other Municipalities |
| Clerk/Treasurer - 437-1735 | Green Oak Township 810-231-1333 |
| Cemetery Info. - 437-1735 | Lyon Township 248-437-2240 |
| Fire - 437-2616 | Salem Township 248-349-1690 |
| Police - 437-1773 | Northfield Township 734-449-2880 |
| DPW - 437-6914 | Oakland County - 248-858-1000 |
| Water Plant - 437-4006 | Oakland County Equalization - 248-858-2180 |
| Water Billing - 437-2326 | |
| Building Department - 437-5255 | |
| Fax Numbers | Community Numbers |
| City Hall - 248-486-0049 | Active Faith - 437-9790 |
| Police - 248-437-0459 | Animal Control - 248-391-4102 |
| Water - 248-437-0449 | Chamber of Commerce - 437-3257 |
| Historical Depot - 437-9929 | |
| Other Numbers | Housing Commission - 800-898-2848 |
| Salem/South Lyon Library - 437-6431 | |
| Great Lakes Waste - 800-685-7382 | South Lyon Post Office - 800-275-8777 |
| 52nd District Court - 248-305-6511 | South Lyon Recreation - 437-8105 |
| Millennium Digital - 800-444-6997 | South Lyon Schools - 573-8127 |
| RRRASOC - 248-208-2270 | South Lyon Senior Center - 573-8175 |
| South Lyon Youth Assistance - 573-8189 | |
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