EXHIBIT 23 CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS We consent to the incorporation by reference in the Registration Statements of NB&T Financial Group, Inc. on Form S-8, filed on March 23, 1995, of our report dated February 5, 2002, on the 2001 Consolidated Financial Statements of NB&T Financial Group, Inc. /s/ J.D. Cloud & Co. L.L.P. ------------------------------- J.D. Cloud & Co. L.L.P. Cincinnati, Ohio March 20, 2002 -1-