Middlefield Banc Corp. Announces Second Quarter Cash Dividend

MIDDLEFIELD, OHIO  Middlefield Banc Corp. (Pink Sheets:  MBCN) today announced that the company’s board of directors has declared a quarterly cash dividend of $0.26 per common share payable on June 13, 2008, to shareholders of record on May 30, 2008.  Adjusted for a 5% stock dividend paid in the fourth quarter of 2007, this cash dividend represents a 13.5% increase over the dividend paid by Middlefield Banc Corp. in the second quarter of 2007.  It also represents a 4% increase from the cash dividend paid in the first quarter of 2008.

Middlefield Banc Corp., headquartered in Middlefield, Ohio, is a financial holding company with over $430 million in assets.  Its subsidiary, The Middlefield Banking Company, operates full service banking centers and a LPL Financial brokerage office serving Chardon, Garrettsville, Mantua, Middlefield, Newbury and Orwell, as well as a loan production office in Cortland, Ohio.  It also serves the central Ohio market through Emerald Bank, headquartered in Dublin.  Additional information is available at www.middlefieldbank.com.

This announcement contains forward-looking statements that involve risk and uncertainties, including changes in general economic and financial market conditions and the Company’s ability to execute its business plans.  Although management believes the expectations reflected in such statements are reasonable, actual results may differ materially.