| Emergency | 911 | |
| Fire | 847-639-2121 | |
| Police | 847-639-2341 | |
| Village Hall | 847-639-0003 | |
| Township: | ||
| Algonquin | 847-639-2329 | |
| Nunda | 815-459-4011 | |
| County: | ||
| Lake | 847-377-2000 | |
| McHenry | 815-334-4242 | |
| Post Office | 847-639-3131 | |
| Park District | 847-639-6100 | |
| Library | 847-639-4210 | |
| Train | 847-639-4241 | |
| Gas | 888-642-6748 | |
| Electric | 800-334-7661 | |
| Water | 847-639-0003 | |
| Refuse | 847-776-1728 | |
| Telephone | 800-244-4444 | |
| Cable TV | 866-594-1234 | |
| School District: | ||
| 26 | 847-639-7788 | |
| 155 | 815-455-8500 | |
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