RANKING ·
Largest net interest margin improvement in Iowa
29 of 66 credit unions in Iowa that filed for the quarter ended June 30, 2026 are ranked. At least $100 million in total assets and a comparable quarter a year earlier. Institutions with equal values share a rank. Source: NCUA Call Report data.
| Rank | Institution | Headquarters | Net interest margin, change over 12 months | Total assets |
|---|---|---|---|---|
| 1 | The Family Credit Union | Davenport, IA | +70 bps | $253 million |
| 2 | North Star Community Credit Union | Cherokee, IA | +55 bps | $149 million |
| 3 | Affinity Credit Union | Des Moines, IA | +51 bps | $154 million |
| 4 | Cent Credit Union | Mason City, IA | +42 bps | $166 million |
| 5 | Corda Credit Union | Cedar Rapids, IA | +40 bps | $776 million |
| 6 | First Federal Credit Union | Hiawatha, IA | +39 bps | $175 million |
| 7 | Greater Iowa Credit Union | Ames, IA | +38 bps | $715 million |
| 8 | Greenstate Credit Union | North Liberty, IA | +37 bps | $10.9 billion |
| 9 | Dupaco Community Credit Union | Dubuque, IA | +33 bps | $3.5 billion |
| 10 | Midland Credit Union | Urbandale, IA | +30 bps | $101 million |
| 11 | Dutrac Community Credit Union | Dubuque, IA | +25 bps | $1.3 billion |
| 12 | Employees Credit Union | Estherville, IA | +18 bps | $203 million |
| 13 | Veridian Credit Union | Waterloo, IA | +17 bps | $9.2 billion |
| 14 | Collins Community Credit Union | Cedar Rapids, IA | +15 bps | $1.5 billion |
| 15 | Members1st Community Credit Union | Marshalltown, IA | +15 bps | $311 million |
| 16 | Cedar Falls Community Credit Union | Cedar Falls, IA | +13 bps | $252 million |
| 17 | 1st Gateway Credit Union | Camanche, IA | +13 bps | $171 million |
| 18 | North Iowa Community Credit Union | Mason City, IA | +12 bps | $128 million |
| 19 | Aim Credit Union | Dubuque, IA | +7 bps | $201 million |
| 20 | Serve Credit Union | Des Moines, IA | +7 bps | $101 million |
| 21 | Ascentra Credit Union | Bettendorf, IA | +5 bps | $596 million |
| 22 | Financial Plus Credit Union | West Des Moines, IA | +3 bps | $242 million |
| 23 | Premier Credit Union | Des Moines, IA | 0 bps | $383 million |
| 24 | Community 1st Credit Union | Ottumwa, IA | -3 bps | $1.1 billion |
| 25 | Telco Triad Community Credit Union | Sioux City, IA | -10 bps | $160 million |
| 26 | Community Choice Credit Union | Johnston, IA | -11 bps | $923 million |
| 27 | River Valley Credit Union | Ames, IA | -18 bps | $119 million |
| 28 | Citizens Community Credit Union | Fort Dodge, IA | -22 bps | $254 million |
| 29 | Advantage Credit Union | Newton, IA | -38 bps | $106 million |
Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings