| Business | Phone |
| Berlin Twp Office 18926 2550 East St, Princeton 61356 | (815) 643-2337 |
| Princeton Fire Dept 2 S Main St, Princeton 61356 | (815) 875-1861 |
| Princeton Building Dept 1105 N Euclid Ave, Princeton 61356 | (815) 879-3381 |
| Princeton Building Dept 2 S Main St, Princeton 61356 | (815) 879-3381 |
| Princeton Cable Commission 2 S Main St, Princeton 61356 | (815) 875-8920 |
| Princeton Clerk 2 S Main St, Princeton 61356 | (815) 875-2631 |
| Princeton Dept Of St & Public 1105 N Euclid Ave, Princeton 61356 | (815) 872-7331 |
| Princeton Power Plant 2 N Main St, Princeton 61356 | (815) 875-1231 |
| Princeton Recycling Ctr 16 E Railroad Ave, Princeton 61356 | (815) 872-1345 |
| Princeton Twp Office 235 E Railroad Ave, Princeton 61356 | (815) 872-8361 |
| Princeton Twp Supervisor 235 E Railroad Ave, Princeton 61356 | (815) 872-0159 |
| Princeton Waste Water Trtmnt 1018 W Clark St, Princeton 61356 | (815) 879-3961 |
| Princeton Water & Light Bllng 2 S Main St, Princeton 61356 | (815) 875-4144 |