Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in this Registration Statement on Form S-1 of First National Corporation of our report dated March 28, 2012, relating to our audit of the consolidated financial statements, which appears in the Annual Report on Form 10-K of First National Corporation for the year ended December 31, 2011.
We also consent to the reference to our firm under the caption “Experts” in the Prospectus, which is part of this Registration Statement.
/s/ YOUNT, HYDE & BARBOUR, P.C.
Winchester, Virginia
July 31, 2012