| Emergency | 911 | |
| Fire | 847-272-2141 | |
| Police | 847-564-2060 | |
| Village Hall | 847-272-5050 | |
| Township: | ||
| Northfield | 847-724-8300 | |
| County: | ||
| Cook | 312-603-5656 | |
| Post Office | 847-272-0018 | |
| Park District | 847-291-2960 | |
| Library | 847-272-6224 | |
| Train | 847-272-0228 | |
| Gas | 888-642-6748 | |
| Electric | 800-334-7661 | |
| Water | 847-272-5050 | |
| Refuse | 847-272-4145 | |
| Telephone | 800-244-4444 | |
| Cable TV | 866-594-1234 | |
| School District: | ||
| 21 | 847-755-6600 | |
| 27 | 847-498-2610 | |
| 28 | 847-498-7900 | |
| 29 | 847-446-6363 | |
| 30 | 847-498-4190 | |
| 31 | 847-272-6880 | |
| 203 | 847-446-7000 | |
| 214 | 847-718-7600 | |
| 225 | 847-486-4700 | |
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