| Emergency | 911 | |
| Fire | 847-251-1101 | |
| Police | 847-256-1200 | |
| Village Hall | 847-251-2700 | |
| Township: | ||
| New Trier | 847-466-8202 | |
| Northfield | 847-724-8300 | |
| County: | ||
| Cook | 312-603-5656 | |
| Post Office | 847-251-8644 | |
| Park District | 847-256-6100 | |
| Library | 847-256-5025 | |
| Train | 847-256-0400 | |
| Gas | 866-556-6004 | |
| Electric | 800-334-7661 | |
| Water | 847-853-7588 | |
| Refuse | 847-853-7626 | |
| Telephone | 800-451-2761 | |
| Cable TV | 866-594-1234 | |
| School District: | ||
| 37 | 847-251-3587 | |
| 38 | 847-256-5006 | |
| 39 | 847-256-2450 | |
| 203 | 847-446-7000 | |
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