RANKING ·
Highest net interest margin in Oklahoma
27 of 52 credit unions in Oklahoma 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 | Cherokee Strip Credit Union | Ponca City, OK | 5.16% | $106 million |
| 2 | Western Sun Federal Credit Union | Broken Arrow, OK | 4.91% | $181 million |
| 3 | Southwest Oklahoma Federal Credit Union | Lawton, OK | 4.89% | $116 million |
| 4 | First Family Federal Credit Union | Henryetta, OK | 4.50% | $154 million |
| 5 | Fort Sill Federal Credit Union | Lawton, OK | 4.27% | $394 million |
| 6 | Green Country Federal Credit Union | Sand Springs, OK | 4.14% | $155 million |
| 7 | Tinker Federal Credit Union | Oklahoma City, OK | 4.03% | $6.1 billion |
| 8 | The Focus Federal Credit Union | Oklahoma City, OK | 4.01% | $163 million |
| 9 | Muskogee Federal Credit Union | Muskogee, OK | 3.89% | $112 million |
| 10 | Communication Federal Credit Union | Oklahoma City, OK | 3.82% | $2.4 billion |
| 11 | Red River Federal Credit Union | Altus, OK | 3.82% | $168 million |
| 12 | Truity Federal Credit Union | Bartlesville, OK | 3.81% | $1.3 billion |
| 13 | Oklahoma Educators Credit Union | Oklahoma City, OK | 3.71% | $305 million |
| 14 | Allegiance Federal Credit Union | Oklahoma City, OK | 3.66% | $372 million |
| 15 | Oklahoma'S Federal Credit Union | Oklahoma City, OK | 3.65% | $954 million |
| 16 | U. S. Employees O. C. Federal Credit Union | Oklahoma City, OK | 3.64% | $213 million |
| 17 | Oklahoma Central Credit Union | Tulsa, OK | 3.60% | $760 million |
| 18 | Westreet Federal Credit Union | Tulsa, OK | 3.46% | $967 million |
| 19 | Okunity Federal Credit Union | Stillwater, OK | 3.44% | $215 million |
| 20 | Red Crown Federal Credit Union | Tulsa, OK | 3.43% | $257 million |
| 21 | Oklahoma Federal Credit Union | Oklahoma City, OK | 3.38% | $199 million |
| 22 | Municipal Emps CU of Oklahoma City | Oklahoma City, OK | 3.30% | $190 million |
| 23 | True Sky Federal Credit Union | Oklahoma City, OK | 3.26% | $778 million |
| 24 | Energy One Federal Credit Union | Tulsa, OK | 3.22% | $301 million |
| 25 | Ttcu Federal Credit Union | Tulsa, OK | 3.12% | $2.7 billion |
| 26 | Weokie Federal Credit Union | Oklahoma City, OK | 2.99% | $1.5 billion |
| 27 | Endurance Federal Credit Union | Duncan, OK | 2.96% | $196 million |
Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings