| Emergency | 911 | |
| Fire | 815-459-2020 | |
| Police | 815-459-2020 | |
| Village Hall | 815-459-2020 | |
| Township: | ||
| Algonquin | 847-639-2329 | |
| Dorr | 815-338-0125 | |
| Grafton | 847-669-3328 | |
| Nunda | 815-459-4011 | |
| County: | ||
| McHenry | 815-334-4290 | |
| Post Office | 815-459-0140 | |
| Park District | 815-459-0680 | |
| Hospital | 815-455-3650 | |
| Library | 815-459-1687 | |
| Train | 815-459-0028 | |
| Gas | 888-642-6748 | |
| Electric | 800-334-7661 | |
| Water | 815-459-2020 | |
| Refuse | 815-459-1839 | |
| Telephone | 800-244-4444 | |
| Cable TV | 866-594-1234 | |
| School District: | ||
| 26 | 847-639-7788 | |
| 46 | 815-459-3023 | |
| 47 | 815-459-6070 | |
| 155 | 815-455-8500 | |
| 158 | 847-669-5248 | |
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