What is the biggest bank in Chicago, Illinois?

Written by Editorial Team | Last Updated: August 2026

JPMorgan Chase stands as the largest bank by deposit market share in Chicago, Illinois, anchoring a massive network of retail branches, commercial lending hubs, and corporate wealth management offices throughout the metropolitan area. Other major financial giants, including BMO Harris (following its expansive regional acquisitions), Bank of America, and PNC, also maintain substantial corporate presences, but Chase commands the largest slice of local consumer and commercial deposits in the city.

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