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:
MarchApril 1213, 2022 to AprilMay 12, 2022

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 MarchApril 1213, 2022 to AprilMay 12, 2022,
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 11, 2022.
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
February 15, 2022.  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
FebruaryMay 1412, 2022.  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.
No
Disclosure informationfrom Deutsche Bank Trust Company Americas, as trustee, as certificate administrator,
 and as custodian:

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 an action against DBNTC and DBTCA in New York State
Supreme Court alleging that DBNTC and DBTCA failed to reportperform purported duties, as trustees
for 544 private-label RMBS trusts, to enforce breaches of representations and warranties as to
mortgage loans held by the monthlytrusts distributionand periodto coveredenforce breaches by thisservicers distributionof reporttheir mortgage loan
servicing obligations for the trusts.  During the course of the litigation, plaintiffs dismissed the
case from New York State Supreme Court and refiled two separate cases, one in the U.S. District
Court for the Southern District of New York (the "BlackRock SDNY Case") and the other in the
Superior Court of California, Orange County (the "BlackRock California Case").  Pursuant to a
settlement among the parties, the BlackRock SDNY Case was dismissed on FormDecember 6, 2018,
and the BlackRock California Case was dismissed on January 11, 2019.

On September 27, 2017, DBTCA was added as a defendant to a case brought by certain special
purpose entities including Phoenix Light SF Limited in the U.S. District Court for the Southern
District of New York, in which the plaintiffs previously alleged incorrectly that DBNTC served as
trustee for all 43 of the trusts at issue.  On September 27, 2017, plaintiffs filed a third amended
complaint that names DBTCA as a defendant in addition to DBNTC.  DBTCA serves as trustee
for one of the 43 trusts at issue.  DBNTC serves as trustee for the other 42 trusts at issue.
Plaintiffs' third amended complaint brings claims for violation of the U.S. Trust Indenture Act of
1939 ("TIA"); breach of contract; breach of fiduciary duty; negligence and gross negligence;
violation of the New York Streit Act ("Streit Act"); and breach of the covenant of good faith.
However, in the third amended complaint, plaintiffs acknowledge that, before DBTCA was added
to the case, the court dismissed plaintiffs' TIA claims, negligence and gross negligence claims,
Streit Act claims, claims for breach of the covenant of good faith, and certain theories of plaintiffs'
breach of contract claims, and plaintiffs only include these claims to preserve any rights on
appeal.  Plaintiffs allege damages of "hundreds of millions of dollars."  On November 13, 2017,
DBNTC and DBTCA filed an answer to the third amended complaint.  On December 7, 2018,
DBNTC and DBTCA filed a motion for summary judgment.  Also on December 7, 2018, plaintiffs,
jointly with Commerzbank AG (see description of Commerzbank case below), filed a motion for
partial summary judgment.  On October 27, 2021, DBNTC and DBTCA filed a supplemental
motion for summary judgment relating to plaintiffs' standing.  On February 8, 2022, the court
issued an order in which it granted DBNTC and DBTCA's supplemental motion for summary
judgment, granted in part DBNTC and DBTCA's initial motion for summary judgment, and denied
plaintiffs' motion for partial summary judgment.  As a result of that order, all of plaintiffs' claims
were dismissed with prejudice.  On March 10, 2022, plaintiffs filed a notice of appeal to the United
States Court of Appeals for the Second Circuit with respect to the court's orders on the motions to
dismiss and for summary judgment.

On November 30, 2017, DBTCA was added as a defendant to a case brought by Commerzbank
AG ("Commerzbank") in the U.S. District Court for the Southern District of New York, in which
Commerzbank previously alleged incorrectly that DBNTC served as trustee for all 50 of the trusts
at issue.  On November 30, 2017, Commerzbank filed a second amended complaint that names
DBTCA as a defendant in addition to DBNTC.  DBTCA serves as trustee for 1 of the 50 trusts at
issue.  DBNTC serves as trustee for the other 49 trusts at issue.  Commerzbank's second
amended complaint brings claims for violation of the TIA; breach of contract; breach of fiduciary
duty; negligence; violation of the Streit Act; and breach of the covenant of good faith.  However, in
the second amended complaint, Commerzbank acknowledges that, before DBTCA was added to
the case, the court dismissed Commerzbank's TIA claims for the trusts governed by pooling and
servicing agreements, as well as its Streit Act claims and claims for breach of the covenant of
good faith, and Commerzbank only includes these claims to preserve any rights on appeal.  The
second amended complaint alleges that DBNTC and DBTCA caused Commerzbank to suffer
"hundreds of millions of dollars in losses," but the complaint does not include a demand for
money damages in a sum certain.  On January 29, 2018, DBNTC and DBTCA filed an answer to
the second amended complaint.  On December 7, 2018, DBNTC and DBTCA filed a motion for
summary judgment.  Also on December 7, 2018, Commerzbank, jointly with the Phoenix Light
plaintiffs, filed a motion for partial summary judgment.  On February 8, 2022, the court issued an
order in which it granted in part DBNTC and DBTCA's motion for summary judgment and denied
plaintiffs' motion for partial summary judgment.  As a result of that order, many of plaintiffs' claims
and theories were dismissed with prejudice.  Discovery is ongoing.


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. On May 27, 2016, IKB served its complaint asserting claims for breach of
contract, breach of fiduciary duty, breach of duty to avoid conflicts of interest, violation of the
Streit Act, violation of the TIA, violation of Regulation AB, and violation of Section 9 of the Uniform
Commercial Code. IKB alleges that DBNTC and DBTCA are liable for over U.S. $268 million in
damages. On October 5, 2016, DBNTC and DBTCA, together with several other trustees
defending lawsuits by IKB, filed a joint motion to dismiss. On January 6, 2017, IKB filed a notice
of discontinuance, voluntarily dismissing with prejudice all claims as to three trusts. On June 20,
2017, the parties filed a stipulation, voluntarily dismissing with prejudice all claims as to four
additional trusts. On January 27, 2021, the court granted in part and denied in part DBNTC and
DBTCA's motion to dismiss. The court granted the motion to dismiss with respect to IKB's claims
for violations of the Streit Act, Regulation AB, and Section 9 of the Uniform Commercial Code, as
well as certain aspects of IKB's claims for breach of contract, breach of fiduciary duty, and
violation of the TIA. The court denied the remainder of the motion to dismiss. IKB's remaining
claims for breach of contract, breach of fiduciary duty, breach of duty to avoid conflicts of interest,
and violation of the TIA will proceed. On May 10, 2021, DBNTC and DBTCA filed a notice of
appeal with the New York Supreme Court Appellate Division, First Department, regarding certain
aspects of the court's order on the motion to dismiss.  On May 20, 2021, IKB filed a notice of
cross appeal with respect to other aspects of that order. Both appeals have been fully briefed.
On June 2, 2021, IKB filed a motion for re-Dargument regarding certain aspects of the court's order
on the motion to dismiss, which the court denied on August 3, 2021.  On May 13, 2021, DBNTC
and DBTCA filed an answer to the complaint.  On October 28, 2021, the parties filed a stipulation,
voluntarily dismissing with prejudice all claims as to seven additional trusts.  On December 29,
2021, the parties filed a stipulation, voluntarily dismissing with prejudice all claims as to one
additional trust. On April 22, 2022, the parties filed a stipulation, voluntarily dismissing with
prejudice all claims as to 17 certificates at issue (including all claims as to 5 trusts),
leaving 17 trusts at issue.  Discovery is ongoing.

It is DBTCA's belief that it 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 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 $10,397,332.00, a year-to-date figure for
the period of  January 1, 2021 through December 31, 2021.   There is
no material update at this time.


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 AprilMay 12, 2022 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 precedes the signature page hereof.

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 AprilMay 12, 2022 distribution.


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/ Richard Simpson
Name: Richard Simpson
Title: President

Date:    AprilMay 1918, 2022
Filing Compare · UBS-Citigroup Commercial Mortgage Trust 2011-C1
