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, JAMES F. KEEN, 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, 2010 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	President and Chief Executive Officer	February 25, 2011
D. Bryan Jordan	and Director (principal executive
	officer)
/s/ William C. Losch III	Executive Vice President and Chief	February 25, 2011
William C. Losch III	Financial Officer (principal financial
	officer)
/s/ James F. Keen	Executive Vice President and Chief	February 25, 2011
James F. Keen	Accounting Officer (principal
	accounting officer)
/s/ Michael D. Rose	Chairman of the Board and Director	February 25, 2011
Michael D. Rose
/s/ Robert B. Carter	Director	February 25, 2011
Robert B. Carter
/s/ Mark A. Emkes	Director	February 25, 2011
Mark A. Emkes

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Signature	Title	Date
/s/ Vicky B. Gregg	Director	February 25, 2011
Vicky B. Gregg
/s/ James A. Haslam, III	Director	February 25, 2011
James A. Haslam, III
/s/ R. Brad Martin	Director	February 25, 2011
R. Brad Martin
/s/ Vicki R. Palmer	Director	February 25, 2011
Vicki R. Palmer
/s/ Colin V. Reed	Director	February 25, 2011
Colin V. Reed
/s/ William B. Sansom	Director	February 25, 2011
William B. Sansom
/s/ Luke Yancy III	Director	February 25, 2011
Luke Yancy III

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