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Ozaukee County, WI Bank Deposit Market Share

The Port Washington State Bank holds the largest share of deposits in Ozaukee County, WI, 27.2%, followed by BMO Bank N.A. (21.8%) and Associated Bank, N.A. (11.7%). 15 institutions hold $3.40B at 34 offices as of June 30, 2026, up 4.4% from 2025.

Institutions: 15 Offices: 34 Deposits: $3.40B Survey: FDIC Summary of Deposits, June 30, 2026

Largest share changes since 2025

Gained: The Port Washington State Bank (1.05 points); Associated Bank, N.A. (0.86 points); Bank First, N.A. (0.50 points).

Lost: BMO Bank N.A. (-1.58 points); Horicon Bank (-0.76 points); Wells Fargo Bank, N.A. (-0.33 points).

# Institution Offices Deposits Market share Share change from 2025 Deposit change
1 The Port Washington State Bank 8 $926.9M 27.24% +1.05 pts 8.6%
2 BMO Bank N.A. 5 $740.2M 21.75% -1.58 pts -2.6%
3 Associated Bank, N.A. 3 $397.6M 11.69% +0.86 pts 12.7%
4 U.S. Bank N.A. 3 $371.8M 10.93% +0.07 pts 5.1%
5 JPMorgan Chase Bank, N.A. 3 $183.0M 5.38% +0.14 pts 7.1%
6 Bank First, N.A. 1 $180.3M 5.30% +0.50 pts 15.2%
7 Bank Five Nine 2 $165.1M 4.85% -0.16 pts 1.1%
8 Wells Fargo Bank, N.A. 1 $141.9M 4.17% -0.33 pts -3.2%
9 North Shore Bank 2 $96.1M 2.82% +0.11 pts 8.7%
10 Horicon Bank 1 $66.3M 1.95% -0.76 pts -25.0%
11 PNC Bank, N.A. 1 $52.0M 1.53% -0.12 pts -3.5%
12 Pyramax Bank, F.S.B. 1 $25.7M 0.76% -0.26 pts -22.3%
13 Marathon Bank 1 $21.9M 0.64% +0.12 pts 27.5%
14 Town Bank, N.A. 1 $21.0M 0.62% +0.37 pts 156.7%
15 Johnson Bank 1 $12.9M 0.38% +0.01 pts 8.7%

About this list

Deposits are those held at each institution's offices in Ozaukee County as of June 30, 2026, from the FDIC Summary of Deposits, whatever state the institution is headquartered in. Market share is the institution's deposits divided by all deposits in the market. Shares are by bank charter, not rolled up to the holding company, and cover FDIC-insured institutions only, so credit unions are not included. Each office is placed in its county and metro area by the FDIC branch directory; the few offices the directory does not list are left out of the market and of every share.

Share change compares the institution's share in 2025 and 2026 in percentage points. Deposit change compares its deposits here in the two years and includes deposits that moved through mergers and branch sales; "New" means it had no offices here a year earlier. Offices that closed during the year are placed by their ZIP code or city.

Wider markets

Wisconsin deposits by institution Milwaukee-Waukesha, WI metro area Wisconsin bank directory

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