RANKING · Q2 2026

Highest net interest margin in Connecticut

21 of 64 credit unions in Connecticut 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.

Highest net interest margin in Connecticut, Q2 2026
Rank	Institution	Headquarters	Net interest margin on average assets	Total assets
1	Sound Federal Credit Union	Norwalk, CT	4.37%	$116 million
2	Achieve Financial Credit Union	Berlin, CT	4.19%	$176 million
3	United Business & Industry Federal Credit Union	Plainville, CT	4.18%	$141 million
4	America'S First Network Credit Union	East Hartford, CT	4.14%	$105 million
5	Coreplus Federal Credit Union	Norwich, CT	4.14%	$676 million
6	Nutmeg State Financial Credit Union	Rocky Hill, CT	4.11%	$916 million
7	Finex Credit Union	East Hartford, CT	4.04%	$134 million
8	360 Federal Credit Union	Windsor Locks, CT	3.95%	$324 million
9	Fd Community Federal Credit Union	Waterbury, CT	3.84%	$163 million
10	Hartford Federal Credit Union	Hartford, CT	3.70%	$160 million
11	Ellafi Federal Credit Union	Middletown, CT	3.68%	$178 million
12	Mutual Security Credit Union	Shelton, CT	3.67%	$385 million
13	Waterbury Connecticut Teachers Federal Credit Union	Waterbury, CT	3.48%	$365 million
14	Sikorsky Financial Credit Union	Stratford, CT	3.34%	$1.5 billion
15	General Electric Employees Federal Credit Union	Milford, CT	3.21%	$283 million
16	Dutch Point Credit Union	Wethersfield, CT	3.20%	$565 million
17	American Eagle Financial Credit Union	East Hartford, CT	3.19%	$2.8 billion
18	Membersfirst Ct Federal Credit Union	Meriden, CT	3.12%	$107 million
19	Charter Oak Federal Credit Union	Waterford, CT	2.97%	$1.7 billion
20	Connex Credit Union	North Haven, CT	2.67%	$1.1 billion
21	Connecticut State Employees Credit Union	Hartford, CT	1.19%	$2.7 billion

Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings