| Emergency | 911 | |
| Fire | 847-526-2821 | |
| Police | 847-526-2100 | |
| Village Hall | 847-526-8764 | |
| Township: | ||
| Nunda | 815-459-4011 | |
| Wauconda | 847-526-2881 | |
| County: | ||
| Lake | 847-377-2000 | |
| McHenry | 815-338-2040 | |
| Post Office | 847-526-6153 | |
| Park District | 847-526-4851 | |
| Library | 847-526-6225 | |
| Train | 312-322-6777 | |
| Gas | 800-382-3112 | |
| Electric | 800-334-7661 | |
| Water | 847-526-8764 | |
| Refuse | 800-344-5600 | |
| Telephone | 800-244-4444 | |
| Cable TV | 866-594-1234 | |
| School District: | ||
| 15 | 815-385-7210 | |
| 118 | 847-526-7690 | |
| 156 | 815-385-7900 | |
www.villageofislandlake.com