Since its inception in 1955 the Polk County Credit Union has been serving its members in the DES MOINES, Iowa 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 Kristin Katzmann, the Polk County CU has grown its membership to over 810 with assets of more than $5,254,416. They have a main office and 1 branch offices.