Since its inception in 1950 the Great Plains Federal Credit Union has been serving its members in the JOPLIN, Missouri 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 KENNETH MARTIN, the Great Plains FCU has grown its membership to over 29,018 with assets of more than $288,332,713. They have a main office and 12 branch offices.