Middlefield Banc Corp. operates as the bank holding company for The Middlefield Banking Company that provides various commercial banking services to small and medium-sized businesses, professionals, small business owners, and retail customers in northeastern and central Ohio. It offers checking, savings, negotiable order of withdrawal accounts, money market accounts, time certificates of deposit, commercial loans, real estate loans, various consumer loans, safe deposit facilities, and travelers' checks. The company also provides operational and working capital, term business, residential construction, professional, and residential and mortgage loans, as well as consumer installment loans for home improvements, automobiles, boats, and other personal expenditures; loans to finance capital purchases; selected guaranteed or subsidized loan programs for small businesses; and agricultural loans. In addition, the company resolves and disposes troubled assets in Ohio. Further, it offers official checks, money orders, and ATM services, as well as IRA accounts; online banking and bill payment services to individuals; and online cash management services to business customers. Middlefield Banc Corp. was founded in 1901 and is headquartered in Middlefield, Ohio.