| Business | Phone |
| Delhi Charter Township 3505 Holt Rd, Holt 48842 | (517) 694-6054 |
| Delhi Charter Twp Office 2074 Aurelius Rd, Holt 48842 | (517) 694-7002 |
| Delhi Charter Twp 2074 Aurelius Rd, Holt 48842 | (517) 699-3848 |
| Delhi Twp Accounting Dept 2074 Aurelius Rd, Holt 48842 | (517) 699-3858 |
| Delhi Twp Assessing Dept 2074 Aurelius Rd, Holt 48842 | (517) 694-1502 |
| Delhi Twp Clerk's Office 2074 Aurelius Rd, Holt 48842 | (517) 694-2135 |
| Delhi Twp Information 2074 Aurelius Rd, Holt 48842 | (517) 694-2136 |
| Delhi Twp Manager 2074 Aurelius Rd, Holt 48842 | (517) 694-2137 |
| Delhi Twp Public Svc Mntnc Div 1492 Aurelius Rd, Holt 48842 | (517) 699-3874 |
| Delhi Twp Treasurer's Office 2074 Aurelius Rd, Holt 48842 | (517) 694-0333 |
| Downtown Development Authority 2045 Cedar St 2, Holt 48842 | (517) 699-3866 |