| Business | Phone |
| Jefferson Twp Accounts Payable 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6135 |
| Jefferson Twp Administration 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6102 |
| Jefferson Twp Building Dept 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6110 |
| Jefferson Twp Clerks Office 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6132 |
| Jefferson Twp Engineer 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6130 |
| Jefferson Twp Municipal Bldg 1033 Weldon Rd, Oak Ridge 7438 | (973) 697-1500 |
| Jefferson Twp Municipal Utilit Russian & Old 4thamp;, Oak Ridge 7438 | (973) 697-6553 |
| Jefferson Twp Payroll Dept 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6134 |
| Jefferson Twp Planning Board 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6119 |
| Jefferson Twp Purchasing 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6137 |
| Jefferson Twp Recycling 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6141 |
| Jefferson Twp Sanitarian 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6124 |
| Jefferson Twp Violations Bur 1033 Weldon Rd, Oak Ridge 7438 | (973) 208-6129 |