| (Date      of report)                  | April      16, 2009 |
|----------------------------------------|---------------------|
| (Date      of earliest event reported) | April      14, 2009 |

| Delaware                          |   | 1-12202           |   | 93-1120873               |
|-----------------------------------|--------|-------------------|--------|--------------------------|
| (State      or other jurisdiction |   | (Commission       |   | (IRS      Employer       |
| of      incorporation)            |   | File      Number) |   | Identification      No.) |

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| Item 8.01 |   | Other Events                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-----------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|      |   |  On      April 14, 2009, the board of directors of our general partner, ONEOK      Partners GP, L.L.C., announced a quarterly cash distribution of $1.08      per unit, effective for the first quarter 2009, resulting in an annualized      cash distribution of $4.32 per unit.  The first-quarter      distribution is payable on May 15, 2009, to unitholders of record as of      April 30, 2009.  The quarterly cash distribution remains      unchanged from the previous quarter. |
|      |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Item 9.01 |   | Financial Statements and      Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|      |   |  Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|      |   | 99.1      News      release issued by ONEOK Partners, L.P. dated April 14,    2009.                                                                                                                                                                                                                                                                                                                                                                                                        |
|      |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|      |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |

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|   |                |   | ONEOK      Partners, L.P.By:  ONEOK      Partners GP, L.L.C., General Partner   |
|--------|---------------------|--------|-------------------------------------------------------------------------------------------|
|   |                |   |                                                                                      |
| Date:  | April      16, 2009 | By:    | /s/ Curtis L. Dinan                                                                       |
|   |                |   | Executive      Vice President –Chief      Financial Officerand      Treasurer  |
|   |                |   |                                                                                      |

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