Bank Branches › Closed and merged banks › Montana › Montana Bank of Sidney
What happened to Montana Bank of Sidney?
Montana Bank of Sidney in Sidney, MT (earlier called The Sidney National Bank and 1 other name) merged into Montana Bank of Billings of Billings, MT on Apr 1, 1991. After 2 more changes of hands, what was Montana Bank of Sidney is today part of Wells Fargo Bank, National Association (Sioux Falls, SD).
The chain, step by step
From the day it opened to the bank at the end of the chain today. Each step is one entry in the FDIC's record.
- 1916The Sidney National Bank opens in Sidney, MT
- Sep 28, 1979renamed Montana Bank of Sidney, N.A.
- Sep 20, 1990renamed Montana Bank of Sidney
- Apr 1, 1991MERGEDMontana Bank of Sidney merged into Montana Bank of Billings of Billings, MT.FDIC certificate 14052 ends; its business continues under certificate 22825.
- Feb 10, 1995MERGEDMontana Bank of Billings (by then renamed Montana Bank, National Association) of Billings, MT merged into Norwest Bank Montana, National Association of Billings, MT.FDIC certificate 22825 ends; its business continues under certificate 16309.
- Nov 21, 2003MERGEDNorwest Bank Montana, National Association (by then renamed Wells Fargo Bank Montana, National Association) of Billings, MT merged into Wells Fargo Bank, National Association of Sioux Falls, SD.FDIC certificate 16309 ends; its business continues under certificate 3511.
- TodayOPEN
Wells Fargo Bank, National AssociationMain office Sioux Falls, SD · FDIC certificate 3511 · 4,157 offices in 40 states on June 30, 2026Every Wells Fargo Bank, National Association office → Website on file with the FDIC: www.wellsfargo.com
If you still have something from Montana Bank of Sidney
A lien that was never released
If a paid-off mortgage, home-equity line or car loan still shows Montana Bank of Sidney as lienholder, start with Wells Fargo Bank, National Association. In a merger the surviving bank takes over the other bank's loans, so it is the bank to ask for a recordable lien release; if the loan was sold along the way, it can tell you to whom.
The FDIC says it cannot process lien releases for banks that merged or were acquired without government assistance, which is what the record shows here.
Record the release with the same county office that recorded the original mortgage or deed of trust.
An old account, passbook or CD
Ask Wells Fargo Bank, National Association to search for the account under the name Montana Bank of Sidney. A passbook or certificate shows an account existed. It doesn't show the money is still there, and the OCC notes that federal rules require banks to keep most account records for five years.
Accounts nobody touches are eventually turned over to a state. The OCC puts the usual wait at three to five years with no activity, set by each state's law. Search the unclaimed-property program of the state of the owner's last known address on the bank's records, and any other state they lived in. It is free to search and to claim through a state's own site, and MissingMoney.com, an official site of the state administrators' association, searches most states at once.
A safe deposit box
Ask Wells Fargo Bank, National Association which branch now holds boxes from the Montana Bank of Sidney office you used. The OCC says a box with no activity for three to five years (the period is set by state statute) is likely treated as dormant, and its contents may be turned over to the state's unclaimed-property program.
Box contents are not covered by FDIC insurance.
Not sure this is your bank?
Many banks shared a name. Match the city and the years above against your paperwork, or search again with the town.
Credit unions were never FDIC-insured and are not in this record; the NCUA credit union lookup covers those. Banks that closed before about 1970 are not in the FDIC's list either.
One caution: banks also sell single branches. If the office you used was sold to a different bank along the way, the account went with the branch, not with this chain.
This page is drawn from FDIC records and federal guidance. It is not legal advice, and BankBranches is not a bank or a government office. More detail: lien releases · old passbooks and CDs · safe deposit boxes · unclaimed money.
Where the guidance comes from ▾
Source: FDIC BankFind institution and history records, read Nov 15, 2026. The FDIC's list covers banks that ended in about 1970 or later. Look up certificate 14052 in the FDIC BankFind Suite to see the government's own entry. Corrections: me@byclaude.net.