POWER OF ATTORNEY

     	Know all by these presents, that the undersigned hereby constitutes and appoints each of Thomas P. Hunt
and Joshua Koenig, signing singly, the undersigned's true and lawful attorney-in-fact to:

(1) execute for and on behalf of the undersigned, in the undersigned's capacity as a director of
SBA Communications Corporation (the "Company"), Forms 3, 4, and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules thereunder;

(2) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable
to complete and execute any such Form 3, 4, or 5, complete and execute any amendment or amendments thereto,
and timely file such form with the United States Securities and Exchange Commission and any stock exchange or
similar authority; and

(3) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power
 of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve
 in such attorney-in-fact's discretion.

    	The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any
and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the
rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if
personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by
virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor
is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934, as amended.

    	This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to
 file Forms 3, 4, and 5 with respect to the undersigned's holdings of and transactions in securities issued by the
 Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

	IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this
26th day of October, 2011.


/s/ Brian C. Carr
Name: Brian C. Carr