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UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C.
20549

FORM 40-F/A(Amendment No. 1)

[ ] REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE
SECURITIES EXCHANGE ACT OF 1934 OR

[ x ] ANNUAL REPORT PURSUANT TO SECTION 13(a) OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2011

Commission file number: 001-32943



AUGUSTA RESOURCE
CORPORATION(Exact Name of Registrant as Specified in its
Charter)

|Canada                                                                                                                     
|---------------------------------------------------------------------------------------------------------------------------
|(Province or other jurisdiction of incorporation or
      organization)                                                    
|                                                                                                                           
|1041                                                                                                                       
|(Primary Standard Industrial Classification Code)                                                                          
|                                                                                                                           
|N/A                                                                                                                        
|(I.R.S. Employer Identification No.)                                                                                       
|                                                                                                                           
|400  837 West Hastings Street                                                                                             
|Vancouver, British Columbia, Canada V6C 3N6                                                                                
|(604) 687-1717                                                                                                             
|(Address and Telephone Number of Registrants Principal
      Executive Offices)                                           
|                                                                                                                           
|Dorsey & Whitney LLP                                                                                                       
|1400 Wewatta Street, Suite 400                                                                                             
|Denver, Colorado 80202                                                                                                     
|(303) 629-3400                                                                                                             
|(Name, address (including zip code) and telephone number
  (including area code) of agent for service in the United States)

Securities registered or to be registered pursuant to Section
12(b) of the Act:

|Title of Each Class:        | Name of Each Exchange On Which Registered:
|--------------------------- | ------------------------------------------
|Common Shares, no par value | NYSE Amex                                 

Securities registered or to be registered pursuant to Section
12(g) of the Act: N/A

Securities for which there is a reporting obligation pursuant to
Section 15(d) of the Act: N/A

For annual reports, indicate by check mark the information filed
with this form:[ x ]   Annual Information
Form              
[ x ]  Audited Annual Financial Statements

Indicate the number of outstanding shares of each of the
issuer's classes of capital or common stock as of the close of the period
covered by the annual report: As at December 31, 2011, 143,160,392common
shares of the Registrant were issued and outstanding.

Indicate by check mark whether the Registrant (1) has filed all
reports required to be filed by Section 13 or 15(d) of the Exchange Act during
the preceding 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. 
[ x ] Yes [    ]  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 [   ]  No

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EXPLANATORY NOTE

Augusta Resource Corporation (the Company or the
Registrant) is a Canadian issuer eligible to file its annual report pursuant
to Section 13 of the Securities Exchange Act of 1934, as amended (the Exchange
Act), on Form 40-F pursuant to the multi-jurisdictional disclosure system of
the Exchange Act. The Company is a foreign private issuer as defined in Rule
3b-4 under the Exchange Act. Equity securities of the Company are accordingly
exempt from Sections 14(a), 14(b), 14(c), 14(f) and 16 of the Exchange Act
pursuant to Rule 3a12-3.

The Company is filing this Amendment No. 1 to its Annual Report
on Form 40-F, as originally filed on March 20, 2012, to file and amend the
Management Discussion and Analysis prepared as of March 19, 2012. No other
amendments are being to the Annual Report on Form 40-F originally filed.

Other than as expressly set forth above, this Amendment No. 1
does not, and does not purport to, update or restate the information in any item
of the Annual Report that was originally filed on March 20, 2012 or to reflect
any events that have occured after the Annual Report was filed. The filing of
this Amendment No. 1 shall not be deemed an admission that the Annual Report
included any untrue statements of material fact or omitted to state a material
fact necessary to make a statement not misleading.

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EXHIBIT INDEX

The following exhibits have been filed as part of this annual
report on Form 40-F:

|Exhibit            | Description                                                                                                                                                                                  
|------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                  
|Annual Information
|99.1.              | Annual Information Form of the
      Company for the year ended December 31, 2011*                                                                                                           
|99.2.              | Audited consolidated financial statements of
      the Company and notes thereto for the years ended December 31, 2011, 2010
      and 2009 together with the report of the auditors thereon*
|99.3.              | Amended Managements Discussion
      and Analysis for the year ended December 31, 2011**                                                                                                    
|99.4.              | Report of Independent Registered Chartered
    Accountants  attestation of internal controls over financial reporting.*                                                                     
|99.5.              | Code of Business Conduct and
      Ethics*                                                                                                                                                   
|                   |                                                                                                                                                                                              
|Certifications    
|99.6.              | Certificate of Chief Executive Officer Pursuant
      to Section 302 of the Sarbanes-Oxley Act of 2002**                                                                                     
|99.7.              | Certificate of Chief Financial
      Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002**                                                                                     
|99.8.              | Certificate of Chief Executive Officer Pursuant
      to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the
      Sarbanes-Oxley Act of 2002**                                
|99.9.              | Certificate of Chief Financial
      Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section
      906 of the Sarbanes-Oxley Act of 2002**                                
|                   |                                                                                                                                                                                              
|Consents           |                                                                                                                                                                                              
|99.10.             | Consent of Ernst & Young
      LLP*                                                                                                                                                          
|99.11.             | Consent of Conrad Huss of M3 Engineering &
      Technology Corporation*                                                                                                                     
|99.12.             | Consent of Thomas L. Drielick
      of M3 Engineering & Technology Corporation*                                                                                                              
|99.13.             | Consent of William L. Rose of WLR Consulting
      Inc.*                                                                                                                                     
|99.14.             | Consent of John Ajie of URS
      Washington Division*                                                                                                                                       
|99.15.             | Consent of Robert Fong of Moose Mountain
      Technical Services*                                                                                                                           

|*  | previously filed
|-- | ----------------
|** | filed herewith  

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SIGNATURES

Pursuant to the requirements of
the Exchange Act, the Registrant certifies that it meets all of the requirements
for filing on Form 40-F/A and has duly caused this annual report to be signed on
its behalf by the undersigned, thereto duly authorized.

| | AUGUSTA RESOURCE CORPORATION
| | ----------------------------
| |                             
| |                             
| | By:                         
| | Name:                       
| | Title:                      

Date: April 4, 2012

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