Mountrail-Williams Electric Co-Op

218 58th St W
Williston ND 58801

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Opening Hours

  • Mon: 8am-5pm
  • Tue: 8am-5pm
  • Wed: 8am-5pm
  • Thu: 8am-5pm
  • Fri: 8am-5pm


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  • ATM/Debit
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Established in 1991, Mountrail-Williams Electric Cooperative provides power to more than 4,400 customers in Mountrail and Williams counties in northwestern North Dakota. Based in Williston, N.D., the company offers a plethora of services, including grain drying, free replacement of water heaters, electric heat insulation, air conditioning and energy resource conservation (ERC) loans. Mountrail-Williams Electric Cooperative owns and maintains nearly 2,900 miles of overhead line and 320 miles of underground line. The firm receives the power from Upper Missouri Generation & Transmission Cooperative, headquartered in Sidney, Montana.