| Business | Phone |
| Industrial Pretreatment 900 Oakhill Ave, Plymouth 46563 | (574) 936-2368 |
| Plymouth Building Commissioner 111 N Center St, Plymouth 46563 | (574) 936-2824 |
| Plymouth City Central Office 124 N Michigan St, Plymouth 46563 | (574) 936-2124 |
| Plymouth City Gis Office 124 1/2 N Michigan St, Plymouth 46563 | (574) 936-2373 |
| Plymouth Human Resource Dept 2124 Western Ave, Plymouth 46563 | (574) 936-6475 |
| Trustee Center Twp 113 E Washington St # S1, Plymouth 46563 | (574) 936-3726 |