Fergus Federal Credit Union, located in Lewistown, Montana is a full service, member-owned, financial institution. Eligible persons become a member of Fergus Federal credit Union by opening a share account. Fergus Federal Credit Union serves 13 counties- Fergus, Blaine, Choteau, Garfield, Golden Valley, Hill, Judith Basin, Liberty, Meagher, Musselshell, Petroleum, Phillips, and Wheatland Counties.