| Emergency | 911 | |
| Fire | 847-223-2120 | |
| Police | 847-223-2341 | |
| Village Hall | 847-223-8515 | |
| Township: | ||
| Avon | 847-546-2146 | |
| Warren | 847-244-1101 | |
| County: | ||
| Lake | 847-377-2000 | |
| Post Office | 847-223-2787 | |
| Park District | 847-223-4404 | |
| Library | 847-223-5313 | |
| Train | 312-322-6777 | |
| Gas | 866-556-6004 | |
| Electric | 800-334-7661 | |
| Water & Refuse | 847-223-8515 | |
| Telephone | 800-660-3000 | |
| Cable TV | 866-594-1234 | |
| School District: | ||
| 19 | 847-648-2286 | |
| 46 | 847-223-0065 | |
| 50 | 847-816-2530 | |
| 79 | 847-566-0169 | |
| 118 | 847-526-7690 | |
| 120 | 847-949-2200 | |
| 121 | 847-662-1400 | |
| 127 | 847-223-8621 | |
www.villageofgrayslake.com