EXHIBIT 24

POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below does hereby constitute and appoint WILLIAM C. LOSCH III, JEFF L. FLEMING, CLYDE A. BILLINGS, JR., and THOMAS C. ADAMS, JR., jointly and each of them severally, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to execute and sign the Annual Report on Form 10-K for the fiscal year ended December 31, 2011 to be filed with the Securities and Exchange Commission (the “SEC”) pursuant to the provisions of the Securities Exchange Act of 1934 by First Horizon National Corporation and, further, to execute and sign any and all amendments thereto and to file the same, with all exhibits thereto and other documents in connection therewith, with the SEC, granting unto said attorneys-in-fact and agents, and each of them, or their or his or her substitute or substitutes, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all the acts that said attorneys-in-fact and agents, or any of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

	Signature		Title		Date
/s/ D. Bryan Jordan		Chairman of the Board, President, and Chief Executive Officer and Director (principal executive officer)
				February 27, 2012
D. Bryan Jordan
/s/ William C. Losch III		Executive Vice President and Chief Financial Officer (principal financial officer)
				February 27, 2012
William C. Losch III
/s/ Jeff L. Fleming
		Executive Vice President and Chief Accounting Officer (principal accounting officer)		February 27, 2012
Jeff L. Fleming
/s/ Robert B. Carter		Director		February 27, 2012
Robert B. Carter
/s/ John C. Compton		Director		February 27, 2012
John C. Compton
/s/ Mark A. Emkes		Director		February 27, 2012
Mark A. Emkes
/s/ Vicky B. Gregg		Director		February 27, 2012
Vicky B. Gregg

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	Signature		Title		Date
/s/ James A. Haslam, III		Director		February 27, 2012
James A. Haslam, III
/s/ R. Brad Martin		Director		February 27, 2012
R. Brad Martin
/s/ Scott M. Niswonger		Director		February 27, 2012
Scott M. Niswonger
/s/ Vicki R. Palmer		Director		February 27, 2012
Vicki R. Palmer
/s/ Colin V. Reed		Director		February 27, 2012
Colin V. Reed
/s/ Michael D. Rose		Director		February 27, 2012
Michael D. Rose
/s/ William B. Sansom		Director		February 27, 2012
William B. Sansom
/s/ Luke Yancy III		Director		February 27, 2012
Luke Yancy III

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