| (Date      of report)                  | April      13, 2009 |
|----------------------------------------|---------------------|
| (Date      of earliest event reported) | April      9,2009   |

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

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| Item 7.01 |   | Regulation FD Disclosure                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|-----------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|      |   |  On      April 9, 2009, ONEOK, Inc. announced that a representative of ONEOK, Inc.      will present at the American Gas Association Financial Forum in Las Vegas,      Nevada, on May 4, 2009. The presentation will begin at approximately 12:10      p.m. Eastern Daylight Time (11:10 a.m. Central DaylightTime). The      presentation will be conducted by Jim Kneale, president and chief      operating officer of ONEOK, Inc. Mr. Kneale is also president and chief      operating officer of ONEOK Partners, L.P. The      conference will be webcast and will be accessible on ONEOK, Inc.’s Web      site, www.oneok.com.  A      replay of the webcast will be archived for 30 days after the      conference. ONEOK,      Inc. will also post the presentation on its Web site on Sunday, May 3,      2009, beginning at 12:00 p.m. Eastern Daylight Time (11:00 a.m. Central      Daylight Time).  |
| Item 9.01 |   | Financial Statements and      Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|      |   |  Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|      |   | 99.1   News      release issued by ONEOK, Inc. dated April 9, 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|      |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |

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|   |                |   | ONEOK      Partners, L.P.By:  ONEOK      Partners GP, L.L.C., General Partner |
|--------|---------------------|--------|-----------------------------------------------------------------------------------------|
|   |                |   |                                                                                    |
| Date:  | April      13, 2009 | By:    | /s/ Curtis L. Dinan                                                                     |
|   |                |   | Executive      Vice President -Chief      Financial Officer andTreasurer           |

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