FDIC-insured bank
Ion Bank
Bank headquartered in Naugatuck, Connecticut, part of ION FINANCIAL MHC INC.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 251 Church St Naugatuck, CT 06770 |
| County | Naugatuck Valley |
| Website | www.ionbank.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 18198 |
| Federal Reserve RSSD ID | 407506 |
| Status | Active |
| Charter class | SM (STATE) |
| Holding company | ION FINANCIAL MHC INC |
| Domestic offices | 37 |
| Financials as of | June 30, 2026 |
Routing number
FDIC does not publish ABA routing numbers, and many banks use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this bank, the "account details" screen in its online banking, or its official website at www.ionbank.com.
See how your odds compare before you apply at Ion Bank.
Offices nearest to headquarters
| Ion Bank main office Naugatuck, CT |
251 Church St, 06770 |
| Church Street Branch Naugatuck, CT |
87 Church Street, 06770 |
| Naugatuck High School Branch Naugatuck, CT |
543 Rubber Ave, 06770 |
| New Haven Road Branch Naugatuck, CT |
1430 New Haven Rd, 06770 |
| Middlebury Branch Middlebury, CT |
600 Middlebury Rd, 06762 |
| Prospect Branch Prospect, CT |
24 Waterbury Rd, 06712 |
| Waterbury Branch Waterbury, CT |
910 Wolcott St, 06705 |
| Oxford Branch Oxford, CT |
71 Oxford Rd, 06478 |
| Watertown Branch Watertown, CT |
544 Straits Tpke, 06795 |
| Crosby High School Branch Waterbury, CT |
300 Pierpont Rd, 06705 |
| Waterbury Branch Waterbury, CT |
3670 E Main St, 06705 |
| Cheshire Branch Cheshire, CT |
218 Maple Ave, 06410 |
37 offices in total. Browse them by city through the state pages.