| Business | Phone |
| Hanover Sewerage Authority 1000 State Route 10, Whippany 7981 | (973) 428-2477 |
| Hanover Township Building Dept 1000 State Route 10, Whippany 7981 | (973) 428-2462 |
| Hanover Twp Adjustment Board 1000 State Route 10, Whippany 7981 | (973) 428-2461 |
| Hanover Twp Adm Assistant 1000 State Route 10, Whippany 7981 | (973) 428-2470 |
| Hanover Twp Business Adm 1000 State Route 10, Whippany 7981 | (973) 428-2466 |
| Hanover Twp Deputy Clerk 1000 State Route 10, Whippany 7981 | (973) 428-2471 |
| Hanover Twp Engineering 1000 State Route 10, Whippany 7981 | (973) 428-2488 |
| Hanover Twp Health Inspector 1000 State Route 10, Whippany 7981 | (973) 428-2524 |
| Hanover Twp Municipal Building 1000 State Route 10, Whippany 7981 | (973) 428-2500 |
| Hanover Twp Recycling 1000 State Route 10, Whippany 7981 | (973) 428-2495 |
| Hanover Twp Treatment Plant Troy Rd, Whippany 7981 | (973) 428-2486 |