UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q/A

Amendment No.1

(Mark One)

For the quarterly period ended September 30, 2011

or

For the transition period from              to             

Commission file number: 000-53380

Xenith Bankshares, Inc.

(Exact name of registrant as specified in its charter)

(804) 433-2200

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the past 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

The number of shares of Common Stock, par value $1.00 per share, outstanding at November 7, 2011 was 10,446,928.

Explanatory Note

The sole purpose of this Amendment No. 1 to the Quarterly Report on Form 10-Q of Xenith Bankshares, Inc. (the Company) for the period ended September 30, 2011 (the Form 10-Q), as filed with the Securities and Exchange Commission on November 14, 2011, is to furnish Exhibit 101 to the Form 10-Q, which contains the XBRL (eXtensible Business Reporting Language) Interactive Data File for the Company’s financial statements and notes included in Part I, Item 1 of the Form 10-Q. Exhibit 101 was required to be furnished on the original filing date of the Form 10-Q.

No changes have been made to the Form 10-Q other than the furnishing of Exhibit 101 described above. This Amendment No. 1 does not reflect subsequent events occurring after the original filing date of the Form 10-Q or modify or update in any way disclosures made in the Form 10-Q.

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Item 6. Exhibits

Exhibit Index:

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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