RANKING ·
Highest net interest margin in Wisconsin
49 of 98 credit unions in Wisconsin that filed for the quarter ended June 30, 2026 are ranked. At least $100 million in total assets. Institutions with equal values share a rank. Source: NCUA Call Report data.
| Rank | Institution | Headquarters | Net interest margin on average assets | Total assets |
|---|---|---|---|---|
| 1 | Marine Credit Union | La Crosse, WI | 5.61% | $1.1 billion |
| 2 | Prime Financial Credit Union | Cudahy, WI | 5.09% | $161 million |
| 3 | Ripco Credit Union | Rhinelander, WI | 4.97% | $189 million |
| 4 | Indianhead Credit Union | Spooner, WI | 4.37% | $101 million |
| 5 | Unitedone Credit Union | Manitowoc, WI | 4.34% | $348 million |
| 6 | Southern Lakes Credit Union | Kenosha, WI | 4.24% | $113 million |
| 7 | Kohler Credit Union | Sheboygan, WI | 4.17% | $776 million |
| 8 | Members' Advantage Credit Union | Wisconsin Rapid, WI | 4.08% | $185 million |
| 9 | Guardian Credit Union | Oak Creek, WI | 4.01% | $294 million |
| 10 | Premier Financial Credit Union | New Holstein, WI | 4.01% | $132 million |
| 11 | N.E.W. Credit Union | Oconto Falls, WI | 4.00% | $178 million |
| 12 | Royal Credit Union | Eau Claire, WI | 3.95% | $5.9 billion |
| 13 | Firefighters Credit Union | Onalaska, WI | 3.91% | $133 million |
| 14 | Westconsin Credit Union | Menomonie, WI | 3.91% | $2.2 billion |
| 15 | 1st Community Credit Union | Sparta, WI | 3.84% | $288 million |
| 16 | Shoreline Credit Union | Two Rivers, WI | 3.83% | $160 million |
| 17 | Altra Federal Credit Union | Onalaska, WI | 3.80% | $3.1 billion |
| 18 | Oakdale Credit Union | Oakdale, WI | 3.74% | $132 million |
| 19 | Simplicity Credit Union | Marshfield, WI | 3.72% | $547 million |
| 20 | Prospera Credit Union | Appleton, WI | 3.72% | $379 million |
| 21 | Glacier Hills Credit Union | West Bend, WI | 3.67% | $286 million |
| 22 | Connexus Credit Union | Wausau, WI | 3.65% | $4.1 billion |
| 23 | Westby Co-Op Credit Union | Westby, WI | 3.63% | $1.0 billion |
| 24 | Fort Community Credit Union | Fort Atkinson, WI | 3.61% | $450 million |
| 25 | Valley Communities Credit Union | Mosinee, WI | 3.59% | $307 million |
| 26 | Arcadia Credit Union | Arcadia, WI | 3.59% | $144 million |
| 27 | University of Wisconsin Credit Union | Madison, WI | 3.58% | $6.7 billion |
| 28 | First Community CU of Beloit | Beloit, WI | 3.55% | $410 million |
| 29 | Heartland Credit Union | Madison, WI | 3.49% | $667 million |
| 30 | Educators Credit Union | Racine, WI | 3.41% | $4.0 billion |
| 31 | Capital Credit Union | Green Bay, WI | 3.37% | $2.8 billion |
| 32 | Blackhawk Community Credit Union | Janesville, WI | 3.34% | $947 million |
| 33 | Unison Credit Union | Kaukauna, WI | 3.31% | $394 million |
| 34 | Governmental Employees Credit Union | La Crosse, WI | 3.29% | $122 million |
| 35 | Park City Credit Union | Merrill, WI | 3.29% | $397 million |
| 36 | Verve, A Credit Union | Oshkosh, WI | 3.22% | $1.6 billion |
| 37 | Co-Op Credit Union | Black River Fal, WI | 3.19% | $627 million |
| 38 | Fox Communities Credit Union | Appleton, WI | 3.18% | $3.4 billion |
| 39 | Cloverbelt Credit Union | Wausau, WI | 3.15% | $354 million |
| 40 | Superior Choice Credit Union | Superior, WI | 3.14% | $730 million |
| 41 | Tomah Area Credit Union | Tomah, WI | 3.13% | $126 million |
| 42 | Landmark Credit Union | Brookfield, WI | 3.05% | $7.9 billion |
| 43 | Summit Credit Union | Madison, WI | 3.03% | $8.5 billion |
| 44 | Covantage Credit Union | Antigo, WI | 2.95% | $4.2 billion |
| 45 | Winnebago Community Credit Union | Oshkosh, WI | 2.90% | $176 million |
| 46 | Sentry Credit Union | Stevens Point, WI | 2.90% | $173 million |
| 47 | Community First Credit Union | Appleton, WI | 2.47% | $6.8 billion |
| 48 | Pcm Credit Union | Green Bay, WI | 2.38% | $515 million |
| 49 | Northwestern Mutual Credit Union | Milwaukee, WI | 1.76% | $286 million |
Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings