EXHIBIT 23.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in this Current Report on Form 8-K/A of Oak Hill Financial, Inc. of our report dated January 27, 2005 on the consolidated financial statements of Lawrence Financial Holdings, Inc. incorporated by reference in the Annual Report of Lawrence Financial Holdings, Inc. on Form 10-KSB for the year ended December 31, 2004. /s/ Crowe Chizek and Company LLC Columbus, Ohio June 17, 2005 5