Branch Network
ION Bank Locations & Branches Naugatuck, Connecticut
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ION Bank operates 36 branches from its headquarters in Naugatuck, CT, .
ION Bank branch network
Its 36 branches span 2 states and 29 cities. The most are in CONNECTICUT (23) and NEW JERSEY (13). CONNECTICUT holds 79.0% of its branch deposits. Naugatuck, CT has the most of its branches, 4. Its largest office by deposits is the Church Street Branch office in Naugatuck, CT, with $325.2M (14.3% of its branch deposits). It had the same number of branches on June 30, 2025.
ION Bank at a glance
Its CET1 capital ratio was 15.75% at Q2 2026, comfortably above the 7% level required once the capital conservation buffer is included.
- Total assets, Q2 2026
- $2.78B
- CET1 ratio, Q2 2026
- 15.75%
- Deposit insurance
- FDIC
- Regulator
- Federal Reserve
- Latest call report
- Q2 2026, FFIEC 051
- Established
- 1870
Full financial profile · Is ION Bank safe? · ION Bank call report · Routing number
Deposit market share
Share of all FDIC-insured deposits held in each area, from the June 30, 2026 Summary of Deposits. Rank 1 is the largest holder. Shares are by bank charter, not by holding company.
| Area | Rank | Deposit share | Deposits |
|---|---|---|---|
| City: Naugatuck, CT (4 branches) | 1 of 4 | 58.4% | $422.3M |
| State: CT (23 branches) | 14 of 46 | 1.0% | $1.80B |
Ranked by total assets among banks headquartered in the state: Largest banks in Connecticut.
Share by county and metro area
ION Bank's share of FDIC-insured deposits in the counties and metro areas where it has branches, from the June 30, 2026 Summary of Deposits. Up to the ten largest of each are shown, by the bank's deposits. Rank 1 is the largest holder. Banks only: credit unions are not in the Summary of Deposits.
Counties
| County | Rank | Deposit share | Deposits | County total |
|---|---|---|---|---|
| Naugatuck Valley, CT (14 branches) | 6 of 16 | 8.2% | $1.02B | $12.45B |
| Bergen, NJ (10 branches) | 25 of 45 | 0.5% | $372.2M | $69.87B |
| New Haven, CT (1 branch) | 1 of 1 | 100.0% | $325.2M | $325.2M |
| South Central Connecticut, CT (4 branches) | 13 of 17 | 1.5% | $299.6M | $20.38B |
| Capitol, CT (4 branches) | 18 of 24 | 0.3% | $156.1M | $52.67B |
| Morris, NJ (3 branches) | 20 of 28 | 0.4% | $106.4M | $28.63B |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| New York-Newark-Jersey City, NY-NJ-PA (13 branches) | 99 of 156 | <0.1% | $478.6M | $2.92T |
| New Haven-Milford, CT (1 branch) | 1 of 1 | 100.0% | $325.2M | $325.2M |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Church Street Branch | Naugatuck, CT | 06770 | $325.2M |
| Oxford Branch | Oxford, CT | 06478 | $202.6M |
| Cheshire Branch | Cheshire, CT | 06410 | $116.0M |
| Prospect Branch | Prospect, CT | 06712 | $103.1M |
| Middlebury Branch | Middlebury, CT | 06762 | $97.7M |
| New Haven Road Branch | Naugatuck, CT | 06770 | $96.5M |
| West Main Street Branch | Meriden, CT | 06451 | $95.6M |
| Southbury Branch | Southbury, CT | 06488 | $90.9M |
| Hamden Branch | Hamden, CT | 06518 | $83.2M |
| Ansonia Branch | Ansonia, CT | 06401 | $82.4M |
| Nve Bank Branch | Englewood, NJ | 07631 | $80.1M |
| Farmington Branch | Farmington, CT | 06032 | $79.0M |
| Watertown Branch | Watertown, CT | 06795 | $70.6M |
| Cresskill Branch | Cresskill, NJ | 07626 | $70.4M |
| Wallingford Branch | Wallingford, CT | 06492 | $70.2M |
| Woodbury Branch | Woodbury, CT | 06798 | $69.8M |
| Lincoln Park Branch | Lincoln Park, NJ | 07035 | $63.5M |
| Meriden Branch | Meriden, CT | 06450 | $50.7M |
| Waterbury Branch | Waterbury, CT | 06705 | $45.0M |
| Waterbury Branch | Waterbury, CT | 06705 | $43.0M |
| Montville Branch | Montville, NJ | 07045 | $42.9M |
| New Milford Branch | New Milford, NJ | 07646 | $41.4M |
| Closter Branch | Closter, NJ | 07624 | $35.3M |
| Bergenfield Branch | Bergenfield, NJ | 07621 | $34.5M |
| Unionville Branch Office | Unionville, CT | 06085 | $30.7M |
| South Windsor Branch Office | South Windsor, CT | 06074 | $26.7M |
| Tenafly Branch | Tenafly, NJ | 07670 | $25.3M |
| Hillsdale Branch | Hillsdale, NJ | 07642 | $25.1M |
| Leonia Branch | Leonia, NJ | 07605 | $24.9M |
| Southington Branch Office | Southington, CT | 06489 | $19.7M |
| Teaneck Branch | Teaneck, NJ | 07666 | $18.4M |
| Palisade Avenue Branch | Teaneck, NJ | 07666 | $16.8M |
| Naugatuck High School Branch | Naugatuck, CT | 06770 | $619K |
| Crosby High School Branch | Waterbury, CT | 06705 | $51K |
| Nj Administrative Office Branch | Pinebrook, NJ | 07058 | $0 |
| ION Bank (main office) | Naugatuck, CT | 06770 | $0 |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 18198) · FFIEC NIC profile (RSSD 407506)