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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                  SCHEDULE 13G

                                 (RULE 13d-102)

Information to be Included in Statements Filed Pursuant to Section 240.13d-1(b),
     (c) and (d) and Amendments Thereto Filed Pursuant to Section 240.13d-2

                    Under the Securities Exchange Act of 1934

                               (Amendment No.__)*

                        Alliance Data Systems Corporation
                       -----------------------------------
                                (Name of Issuer)

                                  Common Stock
                       -----------------------------------
                         (Title of Class of Securities)

                                    018581108
                       -----------------------------------
                                 (CUSIP Number)

                                December 31, 2010
             -------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

            Check the appropriate box to designate the rule pursuant
                        to which this Schedule is filed:

                                (x) Rule 13d-1(b)
                                ( ) Rule 13d-1(c)
                                ( ) Rule 13d-1(d)

----------------
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
                        (Continued on following page(s))



CUSIP No. 018581108                   13G                            Page 2 of 7

1.  NAME OF REPORTING PERSONS

    TIAA-CREF Investment Management, LLC

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ( )
                                                     (b) ( )

3.  SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION

    Delaware

NUMBER OF SHARES BENEFICIALLY OWNED
BY EACH REPORTING PERSON WITH:

    5.  SOLE VOTING POWER                            2,354,626

    6.  SHARED VOTING POWER                          0

    7.  SOLE DISPOSITIVE POWER                       2,354,626

    8.  SHARED DISPOSITIVE POWER                     0

9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                     2,354,626

10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
    SHARES ( )

11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                     4.53%

12. TYPE OF REPORTING PERSON
                                                     IA



CUSIP No. 018581108                   13G                            Page 3 of 7

1.  NAME OF REPORTING PERSONS

    Teachers Advisors, Inc.

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) ( )
                                                     (b) ( )

3.  SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION

    Delaware

NUMBER OF SHARES BENEFICIALLY OWNED
BY EACH REPORTING PERSON WITH:

    5. SOLE VOTING POWER                             348,140

    6. SHARED VOTING POWER                           0

    7. SOLE DISPOSITIVE POWER                        348,140

    8. SHARED DISPOSITIVE POWER                      0

9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                     348,140

10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
    SHARES ()

11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                     0.67%

12. TYPE OF REPORTING PERSON
                                                     IA



CUSIP No. 018581108                   13G                            Page 4 of 7

ITEM 1(a).     NAME OF ISSUER:

                    Alliance Data Systems Corporation

ITEM 1(b).     ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

                    7500 Dallas Parkway
                    Suite 700
                    Plano, TX 75024

ITEMS 2(a)-2(c).    NAME, ADDRESS OF PRINCIPAL BUSINESS OFFICE, AND CITIZENSHIP
                    OF PERSONS FILING:

                    TIAA-CREF Investment Management, LLC ("Investment
                    Management")
                    730 Third Avenue
                    New York, NY  10017-3206
                    Citizenship:  Delaware

                    Teachers Advisors, Inc. ("Advisors")
                    730 Third Avenue
                    New York, NY  10017-3206
                    Citizenship:  Delaware

ITEM 2(d).     TITLE OF CLASS OF SECURITIES:

                    Common Stock

ITEM 2(e).     CUSIP NUMBER:

                    018581108

ITEM 3.        IF THIS STATEMENT IS FILED PURSUANT TO  SECTION 240.13d-1(b), OR
               SECTION 240.13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS
               A:

INVESTMENT MANAGEMENT

(a) ( )        Broker or dealer registered under Section 15 of the Exchange Act.

(b) ( )        Bank as defined in Section 3(a)(6) of the Exchange Act.

(c) ( )        Insurance Company as defined in Section 3(a)(19) of the Exchange
               Act.

(d) ( )        Investment Company registered under Section 8 of the Investment
               Company Act of 1940.

(e) (x)        An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

(f) ( )        An employee benefit plan or endowment fund in accordance with
               Rule 13d-1(b)(1)(ii)(F).

(g) ( )        A parent holding company or control person in accordance with
               Rule 13d-1(b)(1)(ii)(G).

(h) ( )        A savings association as defined in Section 3(b) of the Federal
               Deposit Insurance Act.

(i) ( )        A church plan that is excluded from the definition of an
               investment company under Section 3(c)(14) of the Investment
               Company Act of 1940.



CUSIP No. 018581108                       13G                        Page 5 of 7

(j) ( )        Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

ADVISORS

(a) ( )        Broker or dealer registered under Section 15 of the Exchange Act.

(b) ( )        Bank as defined in Section 3(a)(6) of the Exchange Act.

(c) ( )        Insurance Company as defined in Section 3(a)(19) of the Exchange
               Act.

(d) ( )        Investment Company registered under Section 8 of the Investment
               Company Act of 1940.

(e) (x)        An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

(f) ( )        An employee benefit plan or endowment fund in accordance with
               Rule 13d-1(b)(1)(ii)(F).

(g) ( )        A parent holding company or control person in accordance with
               Rule 13d-1(b)(1)(ii)(G).

(h) ( )        A savings association as defined in Section 3(b) of the Federal
               Deposit Insurance Act.

(i) ( )        A church plan that is excluded from the definition of an
               investment company under Section 3(c)(14) of the Investment
               Company Act of 1940.

(j) ( )        Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

If this statement is filed pursuant to Rule 13d-1(c), check this box. ( )

ITEM 4.        OWNERSHIP

     Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1:

               (a) Aggregate amount beneficially owned: 2,702,766 (See Exhibit A
                   attached)

               (b) Percent of class: 5.20%

               (c) Number of shares as to which the person has:

                              Investment Management             Advisors
                              ---------------------             --------

Sole Voting Power:            2,354,626                         348,140

Shared Voting Power:          0                                 0

Sole Dispositive Power:       2,354,626                         348,140

Shared Dispositive Power:     0                                 0

ITEM 5.        OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

               If this statement is being filed to report the fact that as of
               the date hereof the reporting person has ceased to be the
               beneficial owner of more than 5 percent of the class of
               securities, check the following ( ).



CUSIP No. 018581108                       13G                        Page 6 of 7

ITEM 6.        OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

               See Exhibit A attached

ITEM 7.        IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
               ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
               COMPANY OR CONTROL PERSON.

               Not Applicable

ITEM 8.        IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

               Not Applicable

ITEM 9.        NOTICE OF DISSOLUTION OF GROUP.

               Not Applicable

ITEM 10.       CERTIFICATIONS.

               By signing below I certify that, to the best of my knowledge and
               belief, the securities referred to above were acquired and are
               held in the ordinary course of business and were not acquired and
               are not held for the purpose of or with the effect of changing or
               influencing the control of the issuer of the securities and were
               not acquired and are not held in connection with or as a
               participant in any transaction having that purpose or effect.

               SIGNATURE.

               After reasonable inquiry and to the best of my knowledge and
               belief, I certify that the information set forth in this
               statement is true, complete and correct.

               Date: February 11, 2011

                                         TIAA-CREF INVESTMENT MANAGEMENT, LLC

                                         By: /s/ William J. Wilkinson
                                             ------------------------
                                         William J. Wilkinson, Managing Director
                                         Asset Management Services

                                         TEACHERS ADVISORS, INC.

                                         By: /s/ William J. Wilkinson
                                             ------------------------
                                         William J. Wilkinson, Managing Director
                                         Asset Management Services



CUSIP No. 018581108                       13G                        Page 7 of 7

                                    EXHIBIT A
                                    ---------

ITEM 6.  OWNERSHIP.

TIAA-CREF Investment Management, LLC ("Investment Management") is the investment
adviser to the College Retirement Equities Fund ("CREF"), a registered
investment company, and may be deemed to be a beneficial owner of 2,354,626
shares of Issuer's common stock owned by CREF. Teachers Advisors, Inc.
("Advisors") is the investment adviser to three registered investment companies,
TIAA-CREF Funds ("Funds"), TIAA-CREF Life Funds ("Life Funds"), and TIAA
Separate Account VA-1 ("VA-1"), as well as the TIAA-CREF Asset Management
Commingled Funds Trust I ("TCAM Funds"), and may be deemed to be a beneficial
owner of 348,140 shares of Issuer's common stock owned by the Funds, Life Funds,
VA-1 and TCAM Funds. Investment Management and Advisors are reporting their
combined holdings for the purpose of administrative convenience. These shares
were acquired in the ordinary course of business, and not with the purpose or
effect of changing or influencing control of the Issuer. Each of Investment
Management and Advisors expressly disclaims beneficial ownership of the other's
securities holdings and each disclaims that it is a member of a "group" with the
other.