Exhibit 23a.

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the registration statements on Form S-3D (No. 333-153023), Form S-3D (No. 333-111905), and Form S-3 (No. 333-136106) of Farmers National Banc Corp. of our report dated March 12, 2010, which report is incorporated by reference in the Annual Report on Form 10-K of Farmers National Banc Corp. for the year ended December 31, 2009.

/s/ Crowe Horwath LLP

Crowe Horwath LLP

Cleveland, Ohio
March 16, 2010