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Theresa Grennan

Theresa Grennan has worked in the Winnebago County Treasurer's office since 1994 and previously served as chief deputy treasurer before being appointed treasurer on January 31, 2025, per Winnebago County Treasurer's Office, official page. No campaign website or questionnaire response was found as of September 8, 2026; the official election filing is the only verifiable source for Theresa Grennan.

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