| Rockland Credit Union | Rockland, MA | $3.74B | 213,896 |
| Metro Credit Union | Chelsea, MA | $3.30B | 215,295 |
| Workers Credit Union | Littleton, MA | $2.51B | 119,644 |
| Brightbridge Credit Union | Lawrence, MA | $2.39B | 116,769 |
| Hanscom Credit Union | Hanscom Afb, MA | $2.19B | 96,606 |
| Jeanne D'arc Credit Union | Lowell, MA | $2.19B | 101,712 |
| Greylock Credit Union | Pittsfield, MA | $1.71B | 106,155 |
| Webster First Credit Union | Worcester, MA | $1.50B | 84,905 |
| Sharon & Crescent United Credit Union | Sharon, MA | $1.41B | 70,338 |
| St. Anne's Credit Union | Fall River, MA | $1.35B | 61,731 |
| Harvard Credit Union | Cambridge, MA | $1.25B | 58,845 |
| St. Mary's Credit Union | Marlborough, MA | $1.04B | 56,730 |
| Central One Credit Union | Shrewsbury, MA | $882.7M | 39,109 |
| All One Credit Union | Leominster, MA | $864.4M | 36,606 |
| Liberty Bay Credit Union | Braintree, MA | $839.9M | 21,692 |
| Direct Credit Union | Needham, MA | $789.8M | 23,538 |
| Polish National Credit Union | Chicopee, MA | $765.4M | 28,647 |
| Gfa Credit Union | Gardner, MA | $760.6M | 33,415 |
| Freedom Credit Union | Springfield, MA | $757.4M | 31,707 |
| Mass. Institute of Tech. Credit Union | Lexington, MA | $743.0M | 35,226 |
| Quincy Credit Union | Quincy, MA | $733.0M | 39,322 |
| Umassfive College Credit Union | Hadley, MA | $712.5M | 51,124 |
| First Citizens' Credit Union | Fairhaven, MA | $697.0M | 42,903 |
| Align Credit Union | Lowell, MA | $642.1M | 26,989 |
| I-C Credit Union | Fitchburg, MA | $547.3M | 36,874 |
| City of Boston Credit Union | South Boston, MA | $546.2M | 31,228 |
| Millbury Credit Union | Millbury, MA | $478.3M | 30,003 |
| Boston Firefighters Credit Union | Dorchester, MA | $448.5M | 12,049 |
| Taunton Credit Union | Taunton, MA | $433.5M | 19,214 |
| St. Jean's Credit Union | Lynn, MA | $377.3M | 18,143 |
| Mass Bay Credit Union | South Boston, MA | $367.7M | 17,688 |
| Members Plus Credit Union | Medford, MA | $356.4M | 13,687 |
| Massmutual Credit Union | Springfield, MA | $350.0M | 13,582 |
| Fall River Municipal Credit Union | Fall River, MA | $315.1M | 13,082 |
| Holyoke Credit Union | Holyoke, MA | $299.4M | 21,601 |
| Alltrust Credit Union | Fairhaven, MA | $291.3M | 11,512 |
| Somerset Credit Union | Somerset, MA | $261.9M | 11,688 |
| Tremont Credit Union | Boston, MA | $258.7M | 12,744 |
| Shrewsbury Credit Union | Shrewsbury, MA | $247.6M | 9,664 |
| Southbridge Credit Union | Southbridge, MA | $242.3M | 11,310 |
| Luso Credit Union | Ludlow, MA | $241.8M | 7,926 |
| Greater Springfield Credit Union | Springfield, MA | $227.8M | 10,953 |
| River Works Credit Union | Lynn, MA | $189.8M | 5,341 |
| Alden Credit Union | Chicopee, MA | $187.9M | 12,757 |
| Naveo Credit Union | Somerville, MA | $174.6M | 6,681 |
| Homefield Credit Union | North Grafton, MA | $170.6M | 6,883 |
| New Bedford Credit Union | New Bedford, MA | $168.6M | 10,582 |
| Pioneer Valley Credit Union | Springfield, MA | $164.9M | 11,570 |
| Metrowest Community Credit Union | Framingham, MA | $146.5M | 7,000 |
| First Priority Credit Union | Boston, MA | $143.2M | 5,861 |
| Energy Credit Union | West Roxbury, MA | $129.1M | 5,616 |
| Nesc Credit Union | Methuen, MA | $125.8M | 7,872 |
| Brotherhood Credit Union | Lynn, MA | $125.6M | 5,177 |
| St. Michaels Fall River Credit Union | Fall River, MA | $123.6M | 3,165 |
| Luso-American Credit Union | Peabody, MA | $122.8M | 9,326 |
| Worcester Credit Union | Worcester, MA | $107.1M | 6,355 |
| Common Trust Credit Union | Woburn, MA | $98.1M | 5,788 |
| Athol Credit Union | Athol, MA | $97.3M | 6,279 |
| Tewksbury Credit Union | Tewksbury, MA | $94.8M | 6,033 |
| Franklin First Credit Union | Greenfield, MA | $88.5M | 7,387 |
| Allcom Credit Union | Worcester, MA | $82.7M | 3,823 |
| Westport Credit Union | Westport, MA | $82.4M | 6,169 |
| New England Teamsters Credit Union | Charlestown, MA | $75.0M | 4,023 |
| Stoneham Municipal Employees Credit Union | Stoneham, MA | $70.4M | 4,143 |
| Cranberry Credit Union | West Wareham, MA | $62.7M | 3,447 |
| Southcoast Credit Union | New Bedford, MA | $60.3M | 4,315 |
| Notre Dame Community Credit Union | Fall River, MA | $57.4M | 3,110 |
| Brookline Municipal Credit Union | Brookline, MA | $51.0M | 2,484 |
| Somerville Municipal Credit Union | Somerville, MA | $50.8M | 2,200 |
| Goldmark Credit Union | Attleboro, MA | $49.3M | 2,929 |
| Worcester Fire Dept. Credit Union | Worcester, MA | $47.9M | 2,058 |
| Methuen Credit Union | Methuen, MA | $39.9M | 2,541 |
| 600 Atlantic Credit Union | Boston, MA | $39.3M | 1,452 |
| St. Anthony of Padua Credit Union | Fall River, MA | $37.8M | 1,649 |
| The Andovers Credit Union | Andover, MA | $36.5M | 2,152 |
| Alpha Credit Union | Boston, MA | $35.1M | 3,765 |
| Norfolk Community Credit Union | Norfolk, MA | $33.6M | 3,589 |
| MILLS42 Credit Union | Lowell, MA | $31.9M | 2,938 |
| Taupa Lithuanian Credit Union | South Boston, MA | $29.6M | 1,780 |
| Htm Credit Union | Haverhill, MA | $29.5M | 1,792 |
| Leominster Employees Credit Union | Leominster, MA | $29.3M | 1,696 |
| Massachusetts Family Credit Union | Lynn, MA | $29.2M | 1,389 |
| Malden Credit Union | Malden, MA | $28.9M | 1,554 |
| Mycom Credit Union | Pittsfield, MA | $27.4M | 2,719 |
| Lowell Firefighters Credit Union | Lowell, MA | $27.4M | 1,850 |
| Haverhill Fire Department Credit Union | Haverhill, MA | $27.3M | 1,197 |
| Beverly Municipal Credit Union | Beverly, MA | $26.6M | 1,893 |
| Worcester Police Department Credit Union | Worcester, MA | $25.2M | 1,268 |
| Attleboro M E Credit Union | Attleboro, MA | $25.2M | 1,514 |
| Rah Credit Union | Randolph, MA | $24.0M | 1,852 |
| Billerica Municipal Employees Credit Union | Billerica, MA | $23.8M | 1,258 |
| Somerville School Employees Credit Union | Somerville, MA | $23.1M | 1,381 |
| Chelsea Employees Credit Union | Chelsea, MA | $21.2M | 2,248 |
| Lynn Firemens Credit Union | Lynn, MA | $19.8M | 1,605 |
| Santo Christo Credit Union | Fall River, MA | $19.2M | 1,978 |
| Cambridge Firefighters Credit Union | Cambridge, MA | $14.8M | 864 |
| Marblehead Municipal Credit Union | Marblehead, MA | $12.9M | 1,230 |
| Lynn Police Credit Union | Lynn, MA | $11.6M | 1,022 |
| Burlington Municipal Employees Credit Union | Burlington, MA | $11.0M | 1,156 |
| Cambridge Municipal Employees Credit Union | Cambridge, MA | $10.4M | 1,292 |
| Morton Credit Union | Taunton, MA | $10.1M | 891 |
| Watertown Municipal Credit Union | Watertown, MA | $9.9M | 661 |
| Arlington Municipal Credit Union | Arlington, MA | $9.7M | 907 |
| Dedham Town Employees Credit Union | Dedham, MA | $9.3M | 1,063 |
| Lowell Municipal Employees Credit Union | Lowell, MA | $8.7M | 1,278 |
| Danvers Municipal Credit Union | Danvers, MA | $8.1M | 1,076 |
| Somerville Mass Firefighters Credit Union | Somerville, MA | $7.6M | 285 |
| Medford Municipal Employees Credit Union | Medford, MA | $7.1M | 758 |
| Health Alliance Credit Union | Somerville, MA | $6.1M | 1,239 |
| Norwood Town Employees Credit Union | Norwood, MA | $5.8M | 745 |
| Lynn Teachers Credit Union | Lynn, MA | $5.3M | 667 |
| Revere Firefighters Credit Union | Revere, MA | $4.9M | 232 |
| Middlesex-Essex Postal Employees Credit Union | North Reading, MA | $4.9M | 620 |
| Belmont Municipal Credit Union | Belmont, MA | $3.6M | 383 |
| New England Lee Credit Union | Boston, MA | $2.8M | 256 |
| Boston Customs Credit Union | Boston, MA | $2.5M | 364 |
| Stoughton Town Employees Credit Union | Stoughton, MA | $2.4M | 478 |
| North Adams M E Credit Union | North Adams, MA | $2.3M | 328 |
| Symphony Credit Union | Boston, MA | $2.1M | 209 |
| M.O.S.E.S. Credit Union | Boston, MA | $1.5M | 267 |
| Manchester Credit Union | Manchester, MA | $1.3M | 296 |
| Messiah Baptist-Jubilee Credit Union | Brockton, MA | $1.1M | 229 |