Since its inception in 1938 the Western Cooperative Credit Union has been serving its members in the Williston, North Dakota area with exceptional financial products. You can find their current interest rates on used car loans, new car loans, 1st mortgage loans and interest rates on both fixed and adjustable mortgages here on these pages. Currently led by Melanie Stillwell, the Western Cooperative CU has grown its membership to over 19,185 with assets of more than $322,270,498. They have a main office and 8 branch offices.