| x | ANNUAL
      REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934 | |
| For
      the fiscal year ended December 31, 2009. | ||
| OR | ||
| £ | TRANSITION
      REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934 | |
|  | A.                  
      Full title of the plan and the address of the plan, if different
      from that of the issuer named
below: | 
|  | B.                    
      Name of issuer of the securities held pursuant to the plan and the
      address of its principal executive
office: | 
| Report of Independent Registered Public Accounting firm |  Page
      1 | 
| (a) FINANCIAL STATEMENTS | |
| Financial
      Statements As of and for the Years Ended December 31, 2009 and
      2008 | |
| Statements
      of Net Assets Available for Benefits  |  Page
      2 | 
| Statement
      of Changes in Net Assets Available for Benefits  |  Page
      3 | 
| Notes
      to Financial Statements  |  Page
      4 | 
| Supplemental
      Schedules* | |
| Schedule
      H, Line 4a--Schedule of Delinquent Participant Contributions for the
       year
      ended December 31, 2009  |  Page
      14 | 
| Schedule
      H, Line 4i--Schedule of Assets (Held at End of Year) at  December
      31, 2009  |  Page
      15 | 
| Signature | |
| (b)
      EXHIBITS | |
| Exhibit 23
      - Consent of Independent Registered Public Accounting Firm | 
| 2009 | 2008 | |||||||
| Assets | ||||||||
| Investments,
      at fair value | $ | 268,351,522 | $ | 206,722,026 | ||||
| Participant
      contributions receivable | 65,431 | - | ||||||
| Company
      contributions receivable | 14,176,985 | 6,683,648 | ||||||
| Accrued
      income | - | 752 | ||||||
| Net
      assets reflecting all investments at fair value | 282,593,938 | 213,406,426 | ||||||
| Adjustment
      From Fair Value to Contract Value for | ||||||||
| Fully
      Benefit-Responsive Investment Contracts | 256,730 | 774,928 | ||||||
| Net
      Assets Available for Plan Benefits | $ | 282,850,668 | $ | 214,181,354 | ||||
| Contributions: | ||||
| Employer | $ | 14,167,619 | ||
| Participant | 20,700,608 | |||
| Rollovers | 630,439 | |||
| 35,498,666 | ||||
| Investment
      Income: | ||||
| Interest
      and dividend income | 4,153,479 | |||
| Interest
      on participant loans | 337,907 | |||
| Net
      appreciation in fair value of investments | 47,909,329 | |||
| 52,400,715 | ||||
| Expenses: | ||||
| Administrative
      and other expenses | (42,488 | ) | ||
| Benefits
      paid to participants | (19,392,909 | ) | ||
| (19,435,397 | ) | |||
| Increase
      in Net Assets | 68,463,984 | |||
| Transfers
      In | 205,330 | |||
| Net
      Assets Available for Plan | ||||
| Benefits
      at Beginning of Year | 214,181,354 | |||
| Net
      Assets Available for Plan | ||||
| Benefits
      at End of Year | $ | 282,850,668 | ||
| 2009 | ||||||||||||||||
| Level 1 | Level 2 | Level 3 | Total | |||||||||||||
| Mutual
      funds | $ | 211,447,952 | $ | - | $ | - | $ | 211,447,952 | ||||||||
| Equifax
      common stock | 36,793,635 | - | - | 36,793,635 | ||||||||||||
| Cash,
      interest-bearing | 433,734 | - | - | 433,734 | ||||||||||||
| Collective
      trust fund | - | 13,806,258 | - | 13,806,258 | ||||||||||||
| Participant
      loans | - | - | 5,869,943 | 5,869,943 | ||||||||||||
| $ | 248,675,321 | $ | 13,806,258 | $ | 5,869,943 | $ | 268,351,522 | |||||||||
| 2008 | ||||||||||||||||
| Level 1 | Level 2 | Level 3 | Total | |||||||||||||
| Mutual
      funds | $ | 151,113,929 | $ | - | $ | - | $ | 151,113,929 | ||||||||
| Equifax
      common stock | 35,780,970 | - | - | 35,780,970 | ||||||||||||
| Cash,
      interest-bearing | 413,813 | - | - | 413,813 | ||||||||||||
| Collective
      trust fund | - | 14,365,952 | - | 14,365,952 | ||||||||||||
| Participant
      loans | - | - | 5,047,362 | 5,047,362 | ||||||||||||
| $ | 187,308,712 | $ | 14,365,952 | $ | 5,047,362 | $ | 206,722,026 | |||||||||
| Participant
      Loans: | 2009 | 2008 | ||||||
| Balance,
      beginning of year | $ | 5,047,362 | $ | 2,782,623 | ||||
| Issuances
      and repayments, net | 822,581 | 2,264,739 | ||||||
| Balance,
      end of year | $ | 5,869,943 | $ | 5,047,362 | ||||
| 2009 | 2008 | |||||||
| Equifax
      Inc. common stock participant-directed | $ | 36,793,635 | $ | 35,780,970 | ||||
| Fidelity
      Managed Income Portfolio | ||||||||
|   Trust
      Fund | 13,806,258 | 14,365,952 | ||||||
| Spartan®
      U.S. Equity Index Fund | 25,239,030 | 19,631,709 | ||||||
| Fidelity
      Value Fund | 15,171,861 | ( | *) | |||||
| Fidelity
      Diversified International Balanced Fund | 14,181,893 | ( | *) | |||||
| Fidelity
      Retirement Government Money Market | 18,834,550 | 18,432,027 | ||||||
| Net Appreciation | Interest
      and Dividends | |||||||
| Money
      market funds | $ | - | $ | 56,180 | ||||
| Common/collective
      trusts | - | 241,493 | ||||||
| Equifax
      Inc. common stock | 5,512,703 | - | ||||||
| Mutual
      funds | 42,396,626 | 3,855,806 | ||||||
| $ | 47,909,329 | $ | 4,153,479 | |||||
| 2009 | 2008 | |||||||
| Net
      assets available for plan benefits per the    financial
      statements | $ | 282,850,668 | $ | 214,181,354 | ||||
| Benefits
      payable | (3,450 | ) | (1,989 | ) | ||||
| Adjustment
      from contract value to fair value for    fully
      benefit-responsive investment contracts | (256,730 | ) | (774,928 | ) | ||||
| Net
      assets available for plan benefits per Form    5500 | $ | 282,590,488 | $ | 213,404,437 | ||||
| Total
      investment income per the financial    statements | $ | 52,400,715 | ||
| Less:
      Adjustment from contract value to fair    value
      for fully benefit-responsive investment    contracts
      at December 31, 2009 | (256,730 | ) | ||
| Add:
      Adjustment from contract value to fair    value
      for fully benefit-responsive investment    contracts
      at December 31, 2008 | 774,928 | |||
| Total
      investment income per Form 5500 | $ | 52,918,913 | 
| Total
      expenses per the financial statements | $ | 19,435,397 | ||
|    Add:  Adjustment
      for benefits payable at       December
      31, 2009 | 3,450 | |||
|    Less:
      Adjustment for benefits payable at       December
      31, 2008 | (1,989 | ) | ||
| Total
      expenses per Form 5500 | $ | 19,436,858 | 
| Participant
      Contributions | Total
      That Constitutes Nonexempt | |
| Transferred Late to Plan | Prohibited Transactions | |
| $12,735
      (1) | $12,735
      (1) | 
| (a) | (b) Identity
      of issue,  borrower,
      lessor, or  similar
      party | (c) Description
      of investment including  maturity
      date, rate of interest, collateral,  par
      or maturity value | (d) Cost | (e) Current
      Value | 
| ABF | International
      Equity PA | N/A | $
      4,719,704 | |
| Morgan
      Stanley Instl | U.S.
      Large Cap Growth | N/A | 11,413,254 | |
| Morgan
      Stanley Instl | Midcap
      Growth Adv | N/A | 9,151,823 | |
| Morgan
      Stanley Instl | Emerging
      Markets | N/A | 6,034,635 | |
| PIMCO | Total
      Return Instl | N/A | 13,038,296 | |
| RS
      Partners | Small
      Cap Blend | N/A | 4,729,942 | |
| Employer
      Stock Fund | ||||
| * | Equifax |    Equifax
      Inc. Common Stock | N/A | 36,793,635 | 
| * | Fidelity |    Interest
      Bearing Cash | N/A | 433,734 | 
| * | Fidelity | Real
      Estate | N/A | 1,342,791 | 
| * | Fidelity | Equity
      Income | N/A | 10,948,023 | 
| * | Fidelity | Value | N/A | 15,171,861 | 
| * | Fidelity | Asset
      Manager | N/A | 8,223,142 | 
| * | Fidelity | Low-Priced
      Stock | N/A | 11,964,864 | 
| * | Fidelity | Asset
      Manager: Growth | N/A | 7,425,727 | 
| * | Fidelity | Diversified
      International | N/A | 14,181,893 | 
| * | Fidelity | Freedom
      Income | N/A | 2,621,759 | 
| * | Fidelity | Freedom
      2000 | N/A | 816,979 | 
| * | Fidelity | Freedom
      2010 | N/A | 4,749,805 | 
| * | Fidelity | Freedom
      2020 | N/A | 9,890,272 | 
| * | Fidelity | Freedom
      2030 | N/A | 10,839,240 | 
| * | Fidelity | Freedom
      2040 | N/A | 4,105,883 | 
| * | Fidelity | Freedom
      2050 | N/A | 5,935,761 | 
| * | Fidelity | Retirement
      Government Money Market | N/A | 18,834,550 | 
| * | Fidelity | Managed
      Income Portfolio | N/A | 13,806,258 | 
| * | Fidelity | Spartan®
      US Equity Index | N/A | 25,239,030 | 
| * | Fidelity | US
      Bond Index | N/A | 10,068,718 | 
| * | Participant
      Loans | Varying
      maturities and interest rates from  4.25%
      to 10.25% | N/A |      5,869,943 | 
| $268,351,5222 | 
| EQUIFAX
      INC. 401(k) PLAN | |||
| By: | Group
      Plans Administrative Committee | ||
| Date:  June 18,
      2010 | By: | /s/
      KENT E. MAST | |
| Kent
      E. Mast Corporate
      Vice President and
      Chief Legal Officer; Member
      of the Equifax Inc. Group Plans Administrative
      Committee, Plan
      Administrator | |||
| Exhibit No. | Description  | |
| 23 | Consent
      of Independent Registered Public Accounting
Firm |