| ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE     |
|----------------------------------------------------------|
| SECURITIES EXCHANGE ACT OF 1934                          |
| For the fiscal year ended December 31, 2009              |
| OR                                                       |
| TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE |
| SECURITIES EXCHANGE ACT OF 1934                          |

| Delaware                                                       |   | 73-1283193                           |
|----------------------------------------------------------------|--------|--------------------------------------|
| (State or other jurisdiction of incorporation or organization) |   | (I.R.S. Employer Identification No.) |
|                                                           |   |                                 |
| 7130 South Lewis, Suite 1000                                   |   |                                 |
| Tulsa, Oklahoma                                                |   | 74136                                |
| (Address of principal executive offices)                       |   | (Zip Code)                           |

| Title of each class                       |   | Name of each exchange on which registered |
|-------------------------------------------|--------|-------------------------------------------|
| Common Stock, par value $.20 per share    |   | NYSE                                      |
|                                      |   |                                      |
| Rights to Purchase Series A Participating |   | NYSE                                      |
| Cumulative Preferred Stock                |   |                                      |

|   | Yes [x] | No [ ] |
|--------|---------|--------|

|   | Yes [ ] | No [x] |
|--------|---------|--------|

|   | Yes [x] | No [ ] |
|--------|---------|--------|

|   | Yes [  ] | No [  ] |
|--------|--------------------|-------------------|

| Large accelerated filer [x] | Accelerated filer [ ] | Non-accelerated filer [ ] | Smaller reporting company [ ] |
|-----------------------------|-----------------------|---------------------------|-------------------------------|

|   | Yes [ ] | No [ x] |
|--------|---------|---------|

| Class                                   |   | Outstanding at February 12, 2010 |
|-----------------------------------------|--------|----------------------------------|
| Common Stock, $0.20 par value per share |   | 47,592,327 shares                |

| Document                                                                                                                                                                                                      |   | Parts Into Which Incorporated |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------------------|
| Portions of the registrant’s definitive proxy statement (the “Proxy Statement”)                                                                                                             |   |                          |
| with respect to its annual meeting of shareholders scheduled to be held on May 5, 2010. TheProxy Statement shall be filed within 120 days after the end of the fiscal year to which this report relates. |   | Part III                      |

----

| Item 15. | Exhibits, Financial Statement Schedules |
|---------------|-----------------------------------------|

| 23.2   | Consent of Ryder Scott Company, L.P.                                                 |
|--------|--------------------------------------------------------------------------------------|
|   |                                                                                 |
| 31.1   | Certification of Chief Executive Officer under Rule 13a - 14(a) of the Exchange Act. |
|   |                                                                                 |
| 31.2   | Certification of Chief Financial Officer under Rule 13a - 14(a) of the Exchange Act. |
|   |                                                                                 |
| 99.1   | Ryder Scott Company, L.P. Summary Report.                                            |

|                     |   | UNIT CORPORATION |
|--------------------------|--------|------------------|
|                     |   |             |   |
| DATE: September 17, 2010 |   | By:              | /s/    LARRY D. PINKSTON |
|                     |   |             |   | LARRY D. PINKSTON |
|                     |   |             |   |  President andChief Executive Officer |
|                     |   |             |   | (Principal Executive Officer) |

|                               |   |                                                                                     |
|------------------------------------|--------|------------------------------------------------------------------------------------------|
| Exhibit No.                   |   | Description                                                                              |
|                               |   |                                                                                     |
| 23.2      |   | Consent of  Ryder Scott Company, L.P.                                          |
|                               |   |                                                                                     |
| 31.1      |   | Certification of Chief Executive Officer under Rule 13a—14(a) of the Exchange Act. |
|                               |   |                                                                                     |
| 31.2      |   | Certification of Chief Financial Officer under Rule 13a—14(a) of the Exchange Act. |
|                               |   |                                                                                     |
| 99.1                               |   | Ryder Scott Company, L.P. Summary Report.                                                |