| Business | Phone |
| Dexter Assessor's Office 23 Main St, Dexter 4930 | (207) 924-3241 |
| Dexter Municipal Offices 23 Main St, Dexter 4930 | (207) 924-7351 |
| Dexter Town Lab & Xray 51 High St, Dexter 4930 | (207) 924-7509 |
| Dexter Waste Water Plant Dunn Rd, Dexter 4930 | (207) 924-3075 |
| Town Garage 100 Railroad Ave, Dexter 4930 | (207) 924-6257 |