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| R      | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934                                                                                                                                                                                                                                                                          |
|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                  |
|   | For the quarterly period ended March 31, 2011                                                                                                                                                                                                                                                                                                                         |
|   |                                                                                                                                                                                                                                                                                                                                                                  |
|   | OR                                                                                                                                                                                                                                                                                                                                                               |
| £ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934                                                                                                                                                                                                                                                                         |
|   |                                                                                                                                                                                                                                                                                                                                                                  |
|   | For the transition period from                                                       to |

| Delaware                                                                 | 74-1056569                               |
|--------------------------------------------------------------------------|------------------------------------------|
| (State or Other Jurisdictionof  Incorporation or Organization) | (I.R.S. EmployerIdentification No.) |
|                                                                     |                                     |
| El Paso Building                                                    |                                     |
| 1001 Louisiana StreetHouston, Texas                                      | 77002                                    |
| (Address of Principal Executive Offices)                                 | (Zip Code)                               |

|   | Large accelerated filer o                                                                       |    Accelerated filer o | Non-accelerated filer þ |     Small reporting company o |
|--------|------------------------------------------------------------------------------------------------------|--------------------------------------------|-----------------------------------|--------------------------------------------------------|
|   |           (Do not check if a smaller reporting company) |

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|                | TENNESSEE GAS PIPELINE COMPANY                                                              |   |
|---------------------|---------------------------------------------------------------------------------------------|--------|
|                |                                                                                        |   |
|                | TABLE OF CONTENTS                                                                           |   |
|                |                                                                                        |   |
|                | Caption                                                                                     | Page   |
|                |                                                                                        |   |
|                | PART I — Financial Information                                                   |   |
| Item  1.  | Financial  Statements                                                             | 1      |
| Item  2.  | Management’s Discussion and Analysis of Financial Condition and Results of Operations | 8      |
| Item  3.  | Quantitative and Qualitative Disclosures About Market Risk                             | *      |
| Item  4.  | Controls and Procedures                                                                     | 11     |
|                |                                                                                        |   |
|                | PART II — Other Information                                                      |   |
| Item  1.  | Legal Proceedings                                                                      | 12     |
| Item  1A. | Risk Factors                                                                           | 12     |
| Item  2.  | Unregistered Sales of Equity Securities and Use of Proceeds                            | *      |
| Item  3.  | Defaults Upon Senior Securities                                                        | *      |
| Item  4.  | (Removed and Reserved)                              | 12     |
| Item  5.  | Other Information                                                  | 12     |
| Item  6.  | Exhibits                                                                                    | 13     |
|                | Signatures                                                                                  | 14     |

|  * | We have not included a response to this item in this document since no response is required pursuant to the reduced disclosure format permitted by General Instruction H to Form 10-Q. |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|    |                                                                                                                                                                                             |   |
|    |                                                                                                                                                                                             |   |
|    | Below is a list of terms that are common to our industry and used throughout this document:                                                                                                 |
|    |                                                                                                                                                                                             |   |
|    | /d = per day                                                                                                                                                                                     | BBtu = billion British thermal units |
|    | TBtu = trillion British thermal units                                                                                                                                                       |   |
|    |                                                                                                                                                                                             |   |
|    | When we refer to “us,” “we,” “our,” or “ours,” we are describing Tennessee Gas Pipeline Company and/or our subsidiaries.                         |

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Table of Contents

PART I — FINANCIAL INFORMATION

Item 1.  Financial Statements

|                              |   | Quarter EndedMarch 31, |   |
|----------------------------------------|--------|-----------------------------|--------|
|                                   |   | 2011                        |   |   | 2010 |   |
|                                   |   |                        |   |   |   |   |   |   |
| Operating revenues                     |   | $                           | 234    |   |   | $ | 224 |   |
|                                   |   |                        |   |   |   |   |   |   |
| Operating expenses                     |   |                        |   |   |   |   |   |   |
| Operation and maintenance              |   |                        | 75     |   |   |   | 73 |   |
| Depreciation and amortization          |   |                        | 48     |   |   |   | 48 |   |
| Taxes, other than income taxes         |   |                        | 16     |   |   |   | 14 |   |
|                                   |   |                        | 139    |   |   |   | 135 |   |
| Operating income                       |   |                        | 95     |   |   |   | 89 |   |
| Earnings from unconsolidated affiliate |   |                        | 4      |   |   |   | 4 |   |
| Other income, net                      |   |                        | 8      |   |   |   | 5 |   |
| Interest and debt expense              |   |                        | (37    | ) |   |   | (38 | ) |
| Affiliated interest income, net        |   |                        | 3      |   |   |   | 3 |   |
| Income before income taxes             |   |                        | 73     |   |   |   | 63 |   |
| Income taxes                           |   |                        | 28     |   |   |   | 24 |   |
| Net income                             |   | $                           | 45     |   |   | $ | 39 |   |

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|                                                                                                          |   | March 31,2011 |    |   | December 31,2010 |   |
|---------------------------------------------------------------------------------------------------------------|--------|---------------|---------|--------|-----------------------|--------|
| ASSETS                                                                                                        |   |
| Current assets                                                                                                |   |          |    |   |                  |   |
| Cash and cash equivalents                                                                                     |   | $             | — |   |                  | $      | — |   |
| Accounts and notes receivable                                                                                 |   |          |    |   |                  |   |   |   |
| Customer                                                                                                      |   |          | 37      |   |                  |   | 24 |   |
| Affiliates                                                                                                    |   |          | 370     |   |                  |   | 378 |   |
| Other                                                                                                         |   |          | 45      |   |                  |   | 51 |   |
| Materials and supplies                                                                                        |   |          | 44      |   |                  |   | 44 |   |
| Deferred income taxes                                                                                         |   |          | 43      |   |                  |   | 43 |   |
| Other                                                                                                         |   |          | 5       |   |                  |   | 5 |   |
| Total current assets                                                                                          |   |          | 544     |   |                  |   | 545 |   |
| Property, plant and equipment, at cost                                                                        |   |          | 4,974   |   |                  |   | 4,951 |   |
| Less accumulated depreciation and amortization                                                                |   |          | 1,050   |   |                  |   | 1,056 |   |
|                                                                                                          |   |          | 3,924   |   |                  |   | 3,895 |   |
| Additional acquisition cost assigned to utility plant, net                                                    |   |          | 1,913   |   |                  |   | 1,923 |   |
| Total property, plant and equipment, net                                                                      |   |          | 5,837   |   |                  |   | 5,818 |   |
| Other assets                                                                                                  |   |          |    |   |                  |   |   |   |
| Note receivable from affiliate                                                                                |   |          | 608     |   |                  |   | 617 |   |
| Investment in unconsolidated affiliate                                                                        |   |          | 59      |   |                  |   | 56 |   |
| Other                                                                                                         |   |          | 78      |   |                  |   | 76 |   |
|                                                                                                          |   |          | 745     |   |                  |   | 749 |   |
| Total assets                                                                                                  |   | $             | 7,126   |   |                  | $      | 7,112 |   |
|                                                                                                          |   |          |    |   |                  |   |   |   |
| LIABILITIES AND STOCKHOLDER’S EQUITY                                                                    |   |
| Current liabilities                                                                                           |   |          |    |   |                  |   |   |   |
| Accounts payable                                                                                              |   |          |    |   |                  |   |   |   |
| Trade                                                                                                         |   | $             | 56      |   |                  | $      | 90 |   |
| Affiliates                                                                                                    |   |          | 34      |   |                  |   | 38 |   |
| Other                                                                                                         |   |          | 53      |   |                  |   | 57 |   |
| Current maturities of long-term debt                                                                          |   |          | 86      |   |                  |   | 86 |   |
| Taxes payable                                                                                                 |   |          | 14      |   |                  |   | 23 |   |
| Contractual deposits                                                                                          |   |          | 28      |   |                  |   | 28 |   |
| Asset retirement obligations                                                                                  |   |          | 29      |   |                  |   | 28 |   |
| Accrued interest                                                                                              |   |          | 47      |   |                  |   | 33 |   |
| Regulatory liabilities                                                                                        |   |          | 78      |   |                  |   | 78 |   |
| Other                                                                                                         |   |          | 36      |   |                  |   | 38 |   |
| Total current liabilities                                                                                     |   |          | 461     |   |                  |   | 499 |   |
| Long-term debt, less current maturities                                                                       |   |          | 1,766   |   |                  |   | 1,765 |   |
| Other liabilities                                                                                             |   |          |    |   |                  |   |   |   |
| Deferred income taxes                                                                                         |   |          | 1,446   |   |                  |   | 1,422 |   |
| Regulatory liabilities                                                                                        |   |          | 74      |   |                  |   | 90 |   |
| Other                                                                                                         |   |          | 33      |   |                  |   | 35 |   |
|                                                                                                          |   |          | 1,553   |   |                  |   | 1,547 |   |
| Commitments and contingencies (Note 3)                                                                        |   |          |    |   |                  |   |   |   |
| Stockholder’s equity                                                                                    |   |          |    |   |                  |   |   |   |
| Common stock, par value $5 per share; 300 shares authorized; 208 shares issued and outstanding |   |          | — |   |                  |   | — |   |
| Additional paid-in capital                                                                                    |   |          | 2,209   |   |                  |   | 2,209 |   |
| Retained earnings                                                                                             |   |          | 1,137   |   |                  |   | 1,092 |   |
| Total stockholder’s equity                                                                              |   |          | 3,346   |   |                  |   | 3,301 |   |
| Total liabilities and stockholder’s equity                                                              |   | $             | 7,126   |   |                  | $      | 7,112 |   |

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|                                                                          |   | Quarter EndedMarch 31, |    |
|-------------------------------------------------------------------------------|--------|-----------------------------|---------|
|                                                                          |   | 2011                        |    |   | 2010 |   |
| Cash flows from operating activities                                          |   |                        |    |   |   |   |
| Net income                                                                    |   | $                           | 45      |   |   | $ | 39 |   |
| Adjustments to reconcile net income to net cash from operating activities     |   |                        |    |   |   |   |   |   |
|  Depreciation and amortization                                           |   |                        | 48      |   |   |   | 48 |   |
|  Deferred income taxes                                                   |   |                        | 24      |   |   |   | 11 |   |
|  Earnings from unconsolidated affiliate, adjusted for cash distributions |   |                        | (3      | ) |   |   | (1 | ) |
|  Other non-cash income items                                             |   |                        | (6      | ) |   |   | (1 | ) |
|  Asset and liability changes                                             |   |                        | (35     | ) |   |   | (35 | ) |
| Net cash provided by operating activities                                     |   |                        | 73      |   |   |   | 61 |   |
|                                                                          |   |                        |    |   |   |   |   |   |
| Cash flows from investing activities                                          |   |                        |    |   |   |   |   |   |
| Capital expenditures                                                          |   |                        | (96     | ) |   |   | (57 | ) |
| Net change in note receivable from affiliate                                  |   |                        | 23      |   |   |   | (6 | ) |
| Other                                                                         |   |                        | — |   |   |   | 3 |   |
| Net cash used in investing activities                                         |   |                        | (73     | ) |   |   | (60 | ) |
|                                                                          |   |                        |    |   |   |   |   |   |
| Net change in cash and cash equivalents                                       |   |                        | — |   |   |   | 1 |   |
| Cash and cash equivalents                                                     |   |                        |    |   |   |   |   |   |
| Beginning of period                                                           |   |                        | — |   |   |   | — |   |
| End of period                                                                 |   | $                           | — |   |   | $ | 1 |   |

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|                                         | March 31, 2011 |   |      | December 31, 2010 |   |
|----------------------------------------------|----------------|--------|-----------|-------------------|--------|
|                                         | CarryingAmount |   | FairValue |              |   | CarryingAmount |   |   | FairValue |   |
|                                         | (In millions)  |   |
| Long-term debt, including current maturities | $              | 1,852  |      | $                 | 2,167  |   |   | $ | 1,851 |   |   | $ | 2,071 |   |

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|                                                                 |   | Quarter EndedMarch 31, |    |
|----------------------------------------------------------------------|--------|------------------------|---------|
|                                                                 |   | 2011                   |    |   | 2010 |   |
|                                                                 |   | (In millions)          |    |
| Accounts receivable sold to the third-party financial institution(1) |   | $                      | 204     |   |   | $ | 227 |   |
| Cash received for accounts receivable sold under the program         |   |                   | 118     |   |   |   | 160 |   |
| Deferred purchase price related to accounts receivable sold     |   |                   | 86      |   |   |   | 67 |   |
| Cash received related to the deferred purchase price                 |   |                   | 84      |   |   |   | 85 |   |
| Amount paid in conjunction with terminated program(2)                |   |                   | — |   |   |   | 40 |   |

| (1)   | During the quarters ended March 31, 2011 and 2010, losses recognized on the sale of accounts receivable were immaterial. |
|-----------------|--------------------------------------------------------------------------------------------------------------------------|

| (2)   | In January 2010, we terminated our previous accounts receivable sales program and paid $40 million to acquire the related senior interests in certain receivables under that program.  See our 2010 Annual Report on Form 10-K for further information. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                                                                       |   | March 31,     |   |   | December 31, |   |
|----------------------------------------------------------------------------|--------|---------------|--------|--------|--------------|--------|
|                                                                       |   | 2011          |   |   | 2010         |   |
|                                                                       |   | (In millions) |   |
| Accounts receivable sold and held by third-party financial institution     |   | $             | 76     |   |         | $      | 75 |   |
| Uncollected deferred purchase price related to accounts receivable sold(1) |   |          | 37     |   |         |   | 35 |   |

| (1)   | Initially recorded at an amount which approximates its fair value using observable inputs other than quoted prices in active markets. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------|

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|                                             |   | 2011          |   |   | 2010   |   |
|--------------------------------------------------|--------|---------------|--------|--------|--------|--------|
|                                             |   | (In millions) |   |
| Operating results data:                          |   |          |   |   |   |   |
| Operating revenues                               |   | $             | 5      |   |   | $      | 5 |   |
| Operating expenses                               |   |          | 1      |   |   |   | 1 |   |
| Income from continuing operations and net income |   |          | 4      |   |   |   | 4 |   |

|                                 |   | 2011          |   |   | 2010   |   |
|--------------------------------------|--------|---------------|--------|--------|--------|--------|
|                                 |   | (In millions) |   |
| Revenues(1)                     |   | $             | 43     |   |   | $      | 5 |   |
| Operation and maintenance expenses   |   |          | 17     |   |   |   | 21 |   |
| Reimbursements of operating expenses |   |          | 17     |   |   |   | 15 |   |

| (1)   | During the first quarter of 2011, we sold 5.8 TBtu of natural gas not used in operations to our affiliate, El Paso Marketing, L.P. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------|

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Item 2. Management’s Discussion and Analysis of Financial Condition andResults of Operations

|                                   |   | 2011                             |   |   | 2010   |   |
|----------------------------------------|--------|----------------------------------|--------|--------|--------|--------|
|                                   |   | (In millions,except for volumes) |   |
| Operating revenues                     |   | $                                | 234    |   |   | $      | 224 |   |
| Operating expenses                     |   |                             | (139   | )      |   |   | (135 | ) |
| Operating income                       |   |                             | 95     |   |   |   | 89 |   |
| Earnings from unconsolidated affiliate |   |                             | 4      |   |   |   | 4 |   |
| Other income, net                      |   |                             | 8      |   |   |   | 5 |   |
| Segment EBIT                           |   |                             | 107    |   |   |   | 98 |   |
| Interest and debt expense              |   |                             | (37    | )      |   |   | (38 | ) |
| Affiliated interest income, net        |   |                             | 3      |   |   |   | 3 |   |
| Income taxes                           |   |                             | (28    | )      |   |   | (24 | ) |
| Net income                             |   | $                                | 45     |   |   | $      | 39 |   |
| Throughput volumes (BBtu/d)            |   |                             | 6,424  |   |   |   | 5,491 |   |

|                                                   |   | Variance                |    |
|--------------------------------------------------------|--------|-------------------------|---------|
|                                                   |   | Operating Revenue       |    |   | OperatingExpense |   |   |  Other |   |   | Total |   |
|                                                   |   | Favorable/(Unfavorable) |    |
|                                                   |   | (In millions)           |    |
| Gas not used in operations and other natural gas sales |   | $                       | 9       |   |   | $ | 1 |   |   | $ | — |   |   | $ | 10 |   |
| AFUDC on expansions                                    |   |                    | — |   |   |   | — |   |   |   | 3 |   |   |   | 3 |   |
| Operating and general and administrative expenses      |   |                    | — |   |   |   | (3 | ) |   |   | — |   |   |   | (3 | ) |
| Other(1)                                          |   |                    | 1       |   |   |   | (2 | ) |   |   | — |   |   |   | (1 | ) |
| Total impact on Segment EBIT                           |   | $                       | 10      |   |   | $ | (4 | ) |   | $ | 3 |   |   | $ | 9 |   |

| (1)   | Consists of individually insignificant items. |
|-----------------|-----------------------------------------------|

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| •   | 300 Line Project.  In the first quarter of 2011, we began construction on the pipeline and the remaining compressor facilities and we expect to place the project in service in November 2011.                                                                                |
|---------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                |                                                                                                                                                                                                                                                                                                   |
| •   | Northeast Upgrade Project.  In March 2011, we filed an application with the FERC for certificate authorization to construct this project and we anticipate receiving approval in the fourth quarter of 2011.  The project is anticipated to be placed in service in November 2013. |

|                             |   | 2011                            |   |   | 2010   |   |
|----------------------------------|--------|---------------------------------|--------|--------|--------|--------|
|                             |   | (In millions, except for rates) |   |
| Average advance due from El Paso |   | $                               | 970    |   |   | $      | 901 |   |
| Average short-term interest rate |   |                            | 1.5    | %      |   |   | 1.5 | % |

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|           |   | Quarter EndedMarch 31, 2011 |   |   | 2011Remaining |   |   | Total  |   |
|----------------|--------|-----------------------------|--------|--------|---------------|--------|--------|--------|--------|
|           |   | (In millions)               |   |
| Expansion      |   | $                           | 38     |   |          | $      | 474    |   |   | $ | 512 |   |
| Maintenance    |   |                        | 43     |   |          |   | 134    |   |   |   | 177 |   |
| Other(1)  |   |                        | 15     |   |          |   | 86     |   |   |   | 101 |   |
|           |   | $                           | 96     |   |          | $      | 694    |   |   | $ | 790 |   |

| (1)   | Relates to building renovations at our corporate facilities. |
|-----------------|--------------------------------------------------------------|

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

Item 4. Controls and Procedures

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PART II — OTHER INFORMATION

Item 1. Legal Proceedings

Item 1A. Risk Factors

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Item 3. Defaults Upon Senior Securities

Item 4. (Removed and Reserved)

Item 5. Other Information

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Item 6. Exhibits

| •  •   | should not in all instances be treated as categorical statements of fact, but rather as a way of allocating the risk to one of the parties if those statements prove to be inaccurate; |
|----------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| •  •   | may have been qualified by disclosures that were made to the other party in connection with the negotiation of the applicable agreement, which disclosures are not necessarily reflected in the agreement; |
|----------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| •   | may apply standards of materiality in a way that is different from what may be viewed as material to certain investors; and |
|---------------------|----------------------------------------------------------------------------------------------------------------------------------|

| •  •   | were made only as of the date of the applicable agreement or such other date or dates as may be specified in the agreement and are subject to more recent developments. |
|----------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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SIGNATURES

|                                           | TENNESSEE GAS PIPELINE COMPANY                                                               |   |
|------------------------------------------------|----------------------------------------------------------------------------------------------|--------|
|                                           |                                                                                         |   |
|                                           |                                                                                         |   |
|                                           |                                                                                         |   |
| Date: May 6, 2011          |  /s/ Norman G. Holmes                                                                   |   |
|                                           | Norman G. HolmesPresident(Principal Executive Officer)                                       |   |
|                                           |                                                                                         |   |
|                                           |                                                                                         |   |
|                                           |                                                                                         |   |
|                                           |                                                                                         |   |
| Date: May 6, 2011     |  /s/ John R. Sult                                                                       |   |
|                                           | John R. SultExecutive Vice President andChief Financial Officer(Principal Financial Officer) |   |
|                                           |                                                                                         |   |
|                                           |                                                                                         |   |

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|  ExhibitNumber |  Description                                                                                       |
|---------------------|---------------------------------------------------------------------------------------------------------|
|                |
|   31.A    | Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. |
|   31.B    | Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.     |
|   32.A    | Certification of Principal Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. |
|   32.B    | Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.     |

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