What is the largest bank in Wisconsin?

Written by Editorial Team | Last Updated: August 2026

The largest bank headquartered within the state of Wisconsin is Associated Bank, operating as the principal subsidiary of Associated Banc-Corp, based in Green Bay. With a history spanning well over a century, Associated Bank commands multi-billion-dollar asset portfolios and operates an extensive network of physical branches and digital banking services across Wisconsin, Illinois, and Minnesota, delivering comprehensive commercial, wealth management, and retail financial solutions.

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Wisconsin features a competitive financial sector anchored by prominent regional institutions like Associated Bank, which provides comprehensive retail checking, commercial lending, and an extensive statewide branch network.

Waukesha State Bank operates as an independent, established financial institution anchored directly within the state of Wisconsin, featuring multiple full-service branch locations.

Waukesha State Bank operates as a respected, long-standing independent community bank in Wisconsin, offering a comprehensive suite of personal checking accounts, commercial loans, mortgage services, and digital banking tools.

Waumandee State Bank has been operating as an independent community financial institution for well over a century, having been officially established and opened for business in the early twentieth century in the state of Wisconsin.

Waukesha County stands as the wealthiest and most affluent county in Wisconsin, consistently recording the highest median household incomes and strongest economic indicators in the state.

Waukesha County, Wisconsin, is widely recognized as one of the most affluent and economically prosperous counties in the state, boasting median household incomes and per capita income levels that comfortably exceed both state and national averages.