Form 10-D UBS-Citigroup Commercial For: May 12

UNITED STATES
               SECURITIES AND EXCHANGE COMMISSION
                     Washington D.C. 20549

                            FORM 10-D

                       ASSET-BACKED ISSUER
       DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                 THE SECURITIES EXCHANGE ACT OF 1934

           For the monthly distribution period from:
            April 13, 2016 to May 12, 2016

     Commission File Number of issuing entity: 333-166711-01
       Central Index Key Number of issuing entity: 0001536226

         UBS-Citigroup Commercial Mortgage Trust 2011-C1
   (Exact name of issuing entity as specified in its charter)

         Commission File Number of depositor: 333-166711
         Central Index Key Number of depositor: 0001258361

          Citigroup Commercial Mortgage Securities Inc.
      (Exact name of depositor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001541886
                 UBS Real Estate Securities Inc.
       (Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001542256
                 Natixis Real Estate Capital LLC
       (Exact name of sponsor as specified in its charter)

               Richard Simpson (212) 816-5343
(Name and telephone number, including area code, of the person to
           contact in connection with this filing)

                            New York
   (State or other jurisdiction of incorporation or organization
                       of the issuing entity)

                           45-4307653
             (I.R.S. Employer Identification No.)

c/o Deutsche Bank Trust Company Americas as Certificate Administrator
                1761 East St. Andrew Place, Santa Ana CA
    (Address of principal executive offices of the issuing entity)

                             92705
                          (Zip Code)

                        (212) 816-6000
            (Telephone number, including area code)

                             NONE
    (Former name, former address, if changed since last report)

                  Registered / reporting pursuant to (check one)
Title of Class  Section 12(b)  Section 12(g)  Section 15(d)  Name of Exchange
                                                             (if Section 12(b))
Class A-1           [ ]             [ ]             [X]        Not Applicable
Class A-2           [ ]             [ ]             [X]        Not Applicable
Class A-3           [ ]             [ ]             [X]        Not Applicable
Class A-AB          [ ]             [ ]             [X]        Not Applicable

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 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. Yes _X_   No ____


Part I - DISTRIBUTION INFORMATION

Item 1.  Distribution and Pool Performance Information.
         The distribution report is attached as Exhibit 99.1 to this Form 10-D.

         During the distribution period from April 13, 2016 to May 12,
         2016, no assets securitized by Citigroup Commercial Mortgage Securities
         Inc. (the "Depositor") and held by UBS-Citigroup Commercial Mortgage
         Trust 2011-C1 were the subject of a demand to repurchase or replace for
         breach of the representations and warranties contained in the
         underlying transaction documents.

         The Depositor most recently filed a Form ABS-15G on February 16, 2016.
         The CIK number of the Depositor is 0001258361.

         Natixis Real Estate Capital LLC ("Natixis"), one of the sponsors and
         mortgage loan sellers, most recently filed a Form ABS-15G on
         April 28, 2016.  The CIK number of Natixis is 0001542256.

         UBS Real Estate Securities Inc. ("UBS"), one of the sponsors and
         mortgage loan sellers, most recently filed a Form ABS-15G on
         May 13, 2016.  The CIK number of UBS is 0001541886.

Item 1A. Asset-Level Information.
         Not applicable

Item 1B. Asset Representations Reviewer and Investor Communication.
         Not applicable


Part II - OTHER INFORMATION

Item 2.  Legal Proceedings.
         Disclosure from Deutsche Bank Trust Company Americas, as Trustee:

         Deutsche Bank Trust Company Americas ("DBTCA") and Deutsche
         Bank National Trust Company ("DBNTC") have been sued by
         investors in civil litigation concerning their role as trustees of
         certain residential mortgage-backed securities ("RMBS") trusts.

         On June 18, 2014, a group of investors, including funds managed by
         Blackrock Advisors, LLC, PIMCO-Advisors, L.P., and others, filed a
         derivative action against DBNTC and DBTCA in New York State
         Supreme Court purportedly on behalf of and for the benefit of
         544 private-label RMBS trusts asserting claims for alleged violations
         of the U.S. Trust Indenture Act of 1939 (TIA), breach of contract,
         breach of fiduciary duty and negligence based on DBNTC and
         DBTCA's alleged failure to perform their duties as trustees for the
         trusts. Plaintiffs subsequently dismissed their state court
         complaint and filed a derivative and class action complaint in the
         U.S. District Court for the Southern District of New York on behalf
         of and for the benefit of 564 private-label RMBS trusts, which
         substantially overlapped with the trusts at issue in the state
         court action. The complaint alleges that the trusts at issue have
         suffered total realized collateral losses of U.S. $89.4 billion, but
         the complaint does not include a demand for money damages
         in a sum certain. DBNTC and DBTCA filed a motion to dismiss, and
         on January 19, 2016, the court partially granted the motion on
         procedural grounds: as to the 500 trusts that are governed by
         pooling and servicing agreements, the court declined to
         exercise jurisdiction. The court did not rule on substantive
         defenses asserted in the motion to dismiss.  On March 22, 2016,
         plaintiffs filed an amended complaint in federal court.  In the
         amended complaint, plaintiffs assert claims in connection with
         62 trusts governed by indenture agreements.   The amended
         complaint alleges that the trusts at issue have suffered total
         realized collateral losses of U.S. $9.8 billion, but the complaint
         does not include a demand for money damages in a sum
         certain. DBNTC and DBTCA will have an opportunity to file
         new defensive motions with respect to the amended complaint.
         Discovery is ongoing.

         On March 25, 2016, the BlackRock plaintiffs filed a state court
         action in the Superior Court of California, Orange County that
         involves 513 trusts governed by pooling and servicing agreements,
         alleging three causes of action: breach of contract; breach of
         fiduciary duty; and breach of the duty to avoid conflicts of
         interest.  Plaintiffs purport to bring the action on behalf of
         themselves and all other current owners of certificates in the
         513 trusts.  The complaint currently names only DBTCA as a
         defendant, even though DBTCA is the trustee for only one of the
         513 trusts.  The complaint alleges that the trusts at issue have
         suffered total realized collateral losses of U.S. $85.1 billion,
         but the complaint does not include a demand for money damages
         in a sum certain. DBTCA has not yet been served with the 
         complaint. Discovery has not yet commenced.

         On December 30, 2015, IKB International, S.A. in Liquidation
         and IKB Deutsche Industriebank A.G. (collectively, "IKB"), as
         an investor in 37 RMBS trusts, filed a Summons With Notice
         in the Supreme Court of the State of New York, New York
         County, against DBNTC and DBTCA as trustees of the trusts.
         It appears that IKB may assert claims for violation of the TIA,
         violation of New York's Streit Act, breach of contract, fraud,
         fraudulent and negligent misrepresentation, breach of
         fiduciary duty, negligence, and unjust enrichment. IKB
         appears to allege that DBNTC and DBTCA are liable for over
         U.S. $274 million of damages. DBNTC and DBTCA accepted
         service of the summons with notice. IKB must file a complaint
         by May 27, 2016. Discovery has not yet commenced.

         DBTCA has no pending legal proceedings (including, based on
         DBTCA's present evaluation, the litigation disclosed in the
         foregoing paragraphs) that would materially affect its ability
         to perform its duties as Trustee under the Pooling and
         Servicing Agreement for this transaction.

Item 3.  Sales of Securities and Use of Proceeds.
         None

Item 4.  Defaults Upon Senior Securities.
         None

Item 5.  Submission of Matters to a Vote of Security Holders.
         None

Item 6.  Significant Obligors of Pool Assets.
         With respect to the Trinity Centre Mortgage Loan, based on
         information provided by the Trinity Centre Mortgage Loan Borrower,
         the net operating income for the Trinity Centre Mortgaged Property
         was $14,076,212.00, for the period of January 1, 2015 through
         September 30, 2015.  The Trinity Centre Mortgage Loan was
         defeased on November 6, 2015.

         With respect to the Poughkeepsie Galleria Mortgage Loan, based on
         information provided by the Poughkeepsie Galleria Mortgage Loan
         Borrower, the net operating income for the Poughkeepsie Galleria
         Mortgaged Property was $3,924,825.00, a year-to-date figure for
         the period of  January 1, 2016 through March 31, 2016. 

Item 7.  Change in Sponsor Interest in Securities.
         None

Item 8.  Significant Enhancement Provider Information.
         None

Item 9.  Other Information.
         None

Item 10. Exhibits.
         (a) The following is a list of documents filed as part
             of this Report on Form 10-D:

             (99.1) Monthly Report distributed to holders of the certificates
             issued by UBS-Citigroup Commercial Mortgage Trust 2011-C1,
             relating to the May 12, 2016 distribution.

         (b) The exhibits required to be filed by the Registrant
             pursuant to this Form are listed above and in the Exhibit Index
             that immediately follows the signature page hereof.

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.

Citigroup Commercial Mortgage Securities Inc.
(Depositor)


/s/ Paul Vanderslice
Name: Paul Vanderslice
Title: President

Date:    May 26, 2016


EXHIBIT INDEX

Exhibit Number  Description

  EX-99.1        Monthly report distributed to holders of the certificates
                 issued by UBS-Citigroup Commercial Mortgage Trust 2011-C1,
                 relating to the May 12, 2016 distribution.