|   | (Date      of report)                  | March      12, 2010 |
|--------|----------------------------------------|---------------------|
|   | (Date      of earliest event reported) | March      11, 2010 |

| 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 March 11, 2010, we announced      that we will participate in the Morgan Stanley MLP and Diversified      Natural Gas Corporate Access Day in New York City on Tuesday, March 16,      2010. John      W. Gibson, president and chief executive officer of ONEOK and chairman,      president and chief executive officer of ONEOK Partners GP, L.L.C., our      general partner, and Curtis L. Dinan, chief financial officer and      treasurer for both entities, will be conducting a series of one-on-one      meetings with members of the investment community. The      materials utilized at the conference will be accessible on our Web site,      www.oneokpartners.com, that morning, beginning at 8:00 a.m. Central      Daylight Time.  |
| Item 9.01 |   | Financial Statements and      Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|      |   |  Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|      |   | 99.1   News      release issued by ONEOK, Inc. and ONEOK Partners, L.P. dated March 11,      2010.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|      |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |

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|   |                |   | ONEOK      Partners, L.P.By:  ONEOK      Partners GP, L.L.C., General      Partner |
|--------|---------------------|--------|----------------------------------------------------------------------------------------------|
|   |                |   |                                                                                         |
| Date:  | March      12, 2010 | By:    | /s/ Curtis L. Dinan                                                                          |
|   |                |   | Executive      Vice President -Chief      Financial Officer andTreasurer                |