Bank BranchesEvery insured bank office · FDIC · 1994–2026

Bank Branches › Closed and merged banks › Wisconsin › Ozaukee Bank National Association

FDIC certificate 22017 · Cedarburg, WI

What happened to Ozaukee Bank National Association?

Ozaukee Bank National Association in Cedarburg, WI (earlier called Ozaukee National Bank and 1 other name) merged into Harris National Association of Chicago, IL on Sep 6, 2008. That bank is now called BMO Bank National Association (Chicago, IL).

1975
opened
2008
merged away
3
names it used
1
step to today's bank

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.

  1. 1975
    Ozaukee National Bank opens in Cedarburg, WI
  2. Jan 1, 1982
    renamed Ozaukee Bank
  3. Feb 29, 2008
    renamed Ozaukee Bank National Association
  4. Sep 6, 2008
    MERGEDOzaukee Bank National Association merged into Harris National Association of Chicago, IL.FDIC certificate 22017 ends; its business continues under certificate 16571.
  5. Today
    OPEN
    BMO Bank National AssociationMain office Chicago, IL · FDIC certificate 16571 · 988 offices in 23 states on June 30, 2026

    Every BMO Bank National Association office →   Website on file with the FDIC: www.bmo.com

If you still have something from Ozaukee Bank National Association

A lien that was never released

If a paid-off mortgage, home-equity line or car loan still shows Ozaukee Bank National Association as lienholder, start with BMO 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 BMO Bank National Association to search for the account under the name Ozaukee Bank National Association. 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 BMO Bank National Association which branch now holds boxes from the Ozaukee Bank National Association 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. The office list below shows which bank each office reports under now.

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 ▾

Its offices in the FDIC deposit reports

8 offices filed under this charter in some year from 1994 on. 2 are still open as of June 30, 2026.

OfficeLast filed under itNow
1200 Washington StGrafton, WI2008OpenBMO Bank National Association
201 N Main StThiensville, WI2008OpenBMO Bank National Association
960 West Paradise DriveWest Bend, WI2008No longer reported
N69 W5269 Columbia RoadCedarburg, WI2008No longer reported
623 W Grand AvePort Washington, WI2008No longer reported
205 North Green Bay RoadThiensville, WI2008No longer reported
1425 West Mequon RoadMequon, WI2008No longer reported
225 East Mason StreetMilwaukee, WI2006No longer reported

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 22017 in the FDIC BankFind Suite to see the government's own entry. Corrections: me@byclaude.net.