| Agency Name | Mailing Address | City | State or Province | Postal Code | Phone Number |
| Algonquin PD | 2200 Harnish Drive | Algonquin | IL | 60102 | 847-658-4531 |
| Barrington Hills PD | 112 Algonquin Road | Barrington | IL | 60010 | 847-551-3006 |
| Bull Valley PD | P.O.Box 553 | Woodstock | IL | 60098 | 815-459-4728 |
| Cary PD | 654 Village Hall Drive | Cary | IL | 60013 | 847-639-2341 |
| Crystal Lake PD | 100 W. Municipal Center | Crystal Lake | IL | 60014 | 815-459-2020 |
| Crystal Lake Park Dis | 1 East Crystal Lake Ave | Crystal Lake | IL | 60014 | 815-356-2415 |
| Fox Lake PD | 301 S. Route 59 | Fox Lake | IL | 60020 | 847-587-3100 |
| Fox River Grove PD | 305 Illinois Street | Fox River Grove | IL | 60021 | 847-639-2411 |
| Harvard PD | 201 W. Front Street | Harvard | IL | 60033 | 815-943-4431 |
| Hebron PD | P.O. Box 112 | Hebron | IL | 60034 | 815-648-2351 |
| Holiday Hills PD | 1304 Sunset Drive | Holiday Hills | IL | 60050 | 815-385-2828 |
| Huntley PD | 10911 Main Street | Huntley | IL | 60142 | 847-669-2141 |
| Illinois State Police | 595 State Street | Elgin | IL | 60123 | 847-608-3200 |
| Island Lake PD | 3720 Greenleaf Ave | Island Lake | IL | 60042 | 847-526-2100 |
| Johnsburg PD | 3611 Chapel Hill | Johnsburg | IL | 60050 | 815-385-6024 |
| Lakemoor PD | 27901 Concrete Drive | McHenry | IL | 60050 | 815-385-4111 |
| Lakewood PD | 2500 Lake Ave | Crystal Lake | IL | 60014 | 815-459-2151 |
| Lake in the Hills PD | 1115 Crystal Lake Road | Lake in the Hills | IL | 60156 | 847-658-5676 |
| Marengo PD | 132 E. Prairie Street | Marengo | IL | 60152 | 815-568-7231 |
| McCullom Lake PD | 4811 W. Orchard | McHenry | IL | 60050 | 815-385-2141 |
| McHenry City PD | 333 S. Green Street | McHenry | IL | 60050 | 815-363-2599 |
| McHenry County Conservation | 18410 US Hwy 14 | Woodstock | IL | 60098 | 815-338-6223 |
| McHenry County Sheriff | 2200 N. Seminary | Woodstock | IL | 60098 | 815-334-4750 |
| Oakwood Hills PD | 3020 N Park Drive | Oakwood Hills | IL | 60013 | 815-444-9456 |
| Port Barrington PD | 69 South Circle | Barrington | IL | 60010 | 847-526-2131 |
| Prairie Grove PD | 3121 Barreville Road | Prairie Grove | IL | 60012 | 815-455-3918 |
| Richmond PD | 5600 Hunter Drive | Richmond | IL | 60071 | 815-678-2351 |
| Spring Grove PD | 7401 Meyer Road | Spring Grove | IL | 60081 | 815-675-2596 |
| Union PD | P.O. Box 94 | Union | IL | 90180 | 815-923-2341 |
| Wonder Lake PD | 4444 Thompson Road | Wonder Lake | IL | 60097 | 815-728-0535 |
| Woodstock PD | 656 Lake Ave | Woodstock | IL | 60098 | 815-338-2131 |
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