| Business | Phone |
| B & N Electric Co Inc 105 Navajo Ct, Mchenry 60051 | (815) 344-5700 |
| Berry Electric 713 W Wood St, Mchenry 60051 | (815) 385-8758 |
| Bolger Electrical Svc Mchenry 60050 | (815) 363-5440 |
| Burns & Sons Electric 410 Lakeview Dr, Mchenry 60051 | (815) 363-9750 |
| Carey Electrical Contractors 3407 Waukegan Rd, Mchenry 60050 | (815) 385-3600 |
| S & J Electric Co Inc 2936 Shorewood Dr, Mchenry 60050 | (815) 363-6833 |
| Elec-Temp Inc 538 Herbert Rd, Mchenry 60051 | (815) 759-5200 |
| Ridgeview Electric 1400 Ridgeview Dr, Mchenry 60050 | (815) 385-8282 |
| Harrison Electric Inc 2417 Johnsburg Rd, Mchenry 60050 | (815) 385-9376 |
| Heartland Electrical Svc Mchenry 60050 | (815) 385-8310 |
| Howe Electric Co 1618 N Riverside Dr, Mchenry 60050 | (815) 344-7700 |
| J & S Electrical Contractors 2016 S Il Route 31, Mchenry 60050 | (815) 759-3739 |
| Jasco Electric Corp 2750 Barney Ct, Mchenry 60051 | (815) 363-5905 |
| Lantern Electric Co 500 W Wegner Rd, Mchenry 60051 | (815) 578-0008 |