Contact Us

Office Locations

Rock Energy Cooperative maintains two offices, and both are open from 7:30 a.m. to 4 p.m. Monday through Friday. If you make a payment with one of our Member Services Representatives, your account will be credited on the next business day.

Both offices also have secure drive-through drop boxes for making payments when our offices are closed. Please allow 48 to 72 hours for drop-box payments to be posted to your account.

2815 Kennedy Road
Janesville, WI 53545

15229 Willowbrook Road
South Beloit, IL 61080

Mailing Address:
P.O. Box 1758
Janesville, WI 53547

(608) 752-4550 or (866) 752-4550


Janesville Office: (608) 752-6620
South Beloit Office: (815) 389-9100



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