Middlefield Bank Data Breach Investigation

Turke & Strauss LLP, a leading data breach law firm, is investigating The Middlefield Banking Company, which does business as Middlefield Bank, regarding its recent data breach. The Middlefield Bank data breach involved sensitive personal identifiable information belonging to an undetermined number of individuals.


Middlefield Bank is a full-service bank serving customers throughout Ohio. Founded in 1901, Middlefield Bank provides a variety of banking products and services to individuals and businesses, including checking and savings accounts, loans and credit, wealth and investment management services, and financial education. Additionally, through its partnership with Insuritas, Middlefield Bank offers insurance products to its customers, including as home, auto, commercial, and life insurance policies. Headquartered in Middlefield, Ohio, Middlefield Bank has over $1.7 billion in assets, 21 locations throughout Ohio, and employs over 200 individuals.


On April 12, 2023, Middlefield Bank discovered that it had experienced a data breach in which sensitive personal identifiable information in its systems may have been accessed and acquired. Through its investigation, Middlefield Bank determined that an unauthorized actor may have accessed and acquired this sensitive information between April 11, 2023 and April 12, 2023. On December 21, 2023, Middlefield Bank began notifying individuals whose information may have been impacted by the breach. The type of information exposed includes:

  • Name
  • Social Security number
  • Driver’s license number
  • Passport number
  • Biometric data
  • Date of birth
  • Financial account number
  • Credit or debit card number
  • Username and password
  • Medical information

If you received a breach notification letter from The Middlefield Banking Company:

We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at (608) 237-1775 or sam@turkestrauss.com.

If you were impacted by the Middlefield Bank data breach, you may consider taking the following steps to protect your personal information.

  1. Carefully review the breach notice and retain a copy;
  2. Enroll in any free credit monitoring services provided by The Middlefield Banking Company;
  3. Change passwords and security questions for online accounts;
  4. Regularly review account statements for signs of fraud or unauthorized activity;
  5. Monitor credit reports for signs of identity theft; and
  6. Contact a credit bureau(s) to request a temporary fraud alert.

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