RANKING ·
Highest net interest margin in Massachusetts
58 of 121 credit unions in Massachusetts 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 | Nesc Federal Credit Union | Methuen, MA | 4.21% | $126 million |
| 2 | Tewksbury Federal Credit Union | Tewksbury, MA | 4.12% | $101 million |
| 3 | New Bedford Credit Union | New Bedford, MA | 3.82% | $169 million |
| 4 | Webster First Federal Credit Union | Worcester, MA | 3.73% | $1.5 billion |
| 5 | Taunton Federal Credit Union | Taunton, MA | 3.73% | $440 million |
| 6 | Naveo Credit Union | Somerville, MA | 3.71% | $176 million |
| 7 | First Citizens' Federal Credit Union | Fairhaven, MA | 3.70% | $706 million |
| 8 | Umassfive College Federal Credit Union | Hadley, MA | 3.67% | $703 million |
| 9 | Greylock Federal Credit Union | Pittsfield, MA | 3.65% | $1.8 billion |
| 10 | Worcester Credit Union | Worcester, MA | 3.58% | $107 million |
| 11 | St. Michaels Fall River Federal Credit Union | Fall River, MA | 3.53% | $121 million |
| 12 | Southbridge Credit Union | Southbridge, MA | 3.51% | $242 million |
| 13 | Luso-American Credit Union | Peabody, MA | 3.50% | $123 million |
| 14 | First Priority Credit Union | Boston, MA | 3.43% | $139 million |
| 15 | Pioneer Valley Federal Credit Union | Springfield, MA | 3.39% | $167 million |
| 16 | Holyoke Credit Union | Holyoke, MA | 3.34% | $296 million |
| 17 | Boston Firefighters Credit Union | Dorchester, MA | 3.33% | $453 million |
| 18 | Greater Springfield Credit Union | Springfield, MA | 3.29% | $230 million |
| 19 | Hanscom Federal Credit Union | Hanscom Afb, MA | 3.27% | $2.2 billion |
| 20 | Energy Credit Union | West Roxbury, MA | 3.21% | $129 million |
| 21 | River Works Credit Union | Lynn, MA | 3.18% | $193 million |
| 22 | Homefield Credit Union | North Grafton, MA | 3.17% | $170 million |
| 23 | Tremont Credit Union | Boston, MA | 3.16% | $256 million |
| 24 | Brightbridge Credit Union | Lawrence, MA | 3.14% | $2.4 billion |
| 25 | Mass. Institute of Tech. Federal Credit Union | Lexington, MA | 3.14% | $731 million |
| 26 | Sharon & Crescent United Credit Union | Sharon, MA | 3.06% | $1.4 billion |
| 27 | Common Trust Federal Credit Union | Woburn, MA | 3.06% | $101 million |
| 28 | Central One Federal Credit Union | Shrewsbury, MA | 3.05% | $872 million |
| 29 | Millbury Federal Credit Union | Millbury, MA | 3.03% | $468 million |
| 30 | I-C Federal Credit Union | Fitchburg, MA | 3.03% | $583 million |
| 31 | Mass Bay Credit Union | South Boston, MA | 3.00% | $367 million |
| 32 | Polish National Credit Union | Chicopee, MA | 3.00% | $777 million |
| 33 | Shrewsbury Federal Credit Union | Shrewsbury, MA | 2.96% | $249 million |
| 34 | City of Boston Credit Union | South Boston, MA | 2.93% | $544 million |
| 35 | St. Jean'S Credit Union | Lynn, MA | 2.92% | $373 million |
| 36 | Quincy Credit Union | Quincy, MA | 2.92% | $729 million |
| 37 | Somerset Federal Credit Union | Somerset, MA | 2.87% | $263 million |
| 38 | All One Credit Union | Leominster, MA | 2.84% | $881 million |
| 39 | Align Credit Union | Lowell, MA | 2.83% | $651 million |
| 40 | Liberty Bay Credit Union | Braintree, MA | 2.78% | $827 million |
| 41 | Harvard Federal Credit Union | Cambridge, MA | 2.78% | $1.2 billion |
| 42 | Gfa Federal Credit Union | Gardner, MA | 2.77% | $747 million |
| 43 | Brotherhood Credit Union | Lynn, MA | 2.74% | $125 million |
| 44 | Freedom Credit Union | Springfield, MA | 2.71% | $764 million |
| 45 | St. Mary'S Credit Union | Marlborough, MA | 2.71% | $1.0 billion |
| 46 | St. Anne'S Credit Union | Fall River, MA | 2.71% | $1.4 billion |
| 47 | Jeanne D'Arc Credit Union | Lowell, MA | 2.56% | $2.2 billion |
| 48 | Rockland Federal Credit Union | Rockland, MA | 2.56% | $3.8 billion |
| 49 | Luso Federal Credit Union | Ludlow, MA | 2.49% | $245 million |
| 50 | Alden Credit Union | Chicopee, MA | 2.46% | $185 million |
| 51 | Massmutual Federal Credit Union | Springfield, MA | 2.41% | $344 million |
| 52 | Metrowest Community Federal Credit Union | Framingham, MA | 2.39% | $147 million |
| 53 | Direct Federal Credit Union | Needham, MA | 2.36% | $795 million |
| 54 | Members Plus Credit Union | Medford, MA | 2.14% | $349 million |
| 55 | Fall River Municipal Credit Union | Fall River, MA | 2.09% | $316 million |
| 56 | Metro Credit Union | Chelsea, MA | 2.08% | $3.3 billion |
| 57 | Workers Federal Credit Union | Littleton, MA | 1.99% | $2.5 billion |
| 58 | Alltrust Credit Union | Fairhaven, MA | 1.97% | $280 million |
Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings