|                        | **United                  States Securities and Exchange Commission**         |
|-----------------------------|-------------------------------------------------------------------------------|
|                        |                                                                          |
|                        | **Washington,                  D.C. 20549**                                   |
|                        |                                                                          |
|                        | **Form                  10 QSB**                                              |
|                        |                                                                          |
| (Mark                  One) |                                                                          |
|                        |                                                                          |
| **R**                       | **QUARTERLY                  REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE** |
|                        | **SECURITIES                  EXCHANGE ACT OF 1934**                          |
|                        |                                                                          |
|                        | For                  the quarterly period ended June 30, 2006                 |
|                        |                                                                          |
| o                           | **TRANSITION                  REPORT UNDER SECTION 13 OR 15 (d) OF THE**      |
|                        | **SECURITIES                  EXCHANGE ACT OF 1934**                          |
|                        |                                                                          |
|                        | For                  the transition period from _____ to _____                |
|                        |                                                                          |
|                        | Commission                  file number 333-127355                            |
|                        |                                                                          |
|                        |                                                                          |
|                        | **ATLAS                  AMERICA PUBLIC #15-2005 (A) L.P.**                   |
|                        | (Name                  of small business issuer in its charter)               |
|                        |                                                                          |

|                                                                                                                                                                                    |                                                                  |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------|
|                                                                                                                                                                                    |                                                                  |
| **Delaware**                                                                                                                                                                            | **20-3208344**                                                        |
| (State                  or other jurisdiction ofincorporation                  or organization)                                                                                         | (I.R.S.                  EmployerIdentification                  No.) |
|                                                                                                                                                                                    |                                                                  |
| 311                  Rouser Road                                                                                                                                                        | 15108                                                                 |
| Moon                  Township, PA                                                                                                                                                      | (zip                  code)                                           |
| (Address                  of principal executive offices)                                                                                                                               |                                                                  |
|                                                                                                                                                                                    |                                                                  |
| Issuer’s                  telephone number, including area code: **(412)                  262-2830**                                                                              |
|                                                                                                                                                                                    |
| Check                  whether the issuer (1) filed all reports required to be filed by                  Section                  13 or 15 (d) of the Exchange Act                      |
| during                  the past 12 months (or for such shorter period that the registrant                  was                  required to file such reports),                        |
| and                  (2) has been subject to such filing requirements for the past 90                  days.                  Yes** ****R**                  No                  o |
|                                                                                                                                                                                    |
| Indicate                  by check mark whether the registrant is a shell company (as defined                  in                  Rule 12b-2 of the Exchange                           |
| Act).Yes                  o                  No                  **R**                                                                                                                  |
|                                                                                                                                                                                    |
| Transitional                  Small Business Disclosure Format (check one): Yes o                  No                  **R**                                                            |

**ATLAS        AMERICA PUBLIC #15-2005 (A) L.P.**

**INDEX        TO QUARTERLY REPORT**

**ON        FORM 10-QSB**

| **PART                  I.**  |   | **FINANCIAL                  INFORMATION**                                                                                | **PAGE** |
|-------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------|----------|
|                          |   |                                                                                                                      |     |
| Item                  1:      |   | Financial                  Statements                                                                                     |     |
|                          |   |                                                                                                                      |     |
|                          |   | Balance                  Sheets as of June 30, 2006 and December 31, 2005                  (Unaudited)                    | 3        |
|                          |   |                                                                                                                      |     |
|                          |   | Statements                  of Operations for the Three and Six Months ended June 30,                  2006               |     |
|                          |   | (Unaudited)                                                                                                               | 4        |
|                          |   |                                                                                                                      |     |
|                          |   | Statement                  of Partners’ Capital Accounts for the Six Months ended June 30,                  2006    |     |
|                          |   | (Unaudited)                                                                                                               | 5        |
|                          |   |                                                                                                                      |     |
|                          |   | Statements                  of Cash Flows for the Six Months ended June 30, 2006                                          |     |
|                          |   | (Unaudited)                                                                                                               | 6        |
|                          |   |                                                                                                                      |     |
|                          |   | Notes                  to Financial Statements (Unaudited)                                                                | 7-11     |
|                          |   |                                                                                                                      |     |
| Item                  2:      |   | Management’s                  Discussion and Analysis of Financial Condition or Plan of                  Operations | 11-13    |
|                          |   |                                                                                                                      |     |
| Item                  3:      |   | Controls                  and Procedures                                                                                  | 13       |
|                          |   |                                                                                                                      |     |
| **PART                  II.** |   | **OTHER                  INFORMATION**                                                                                    |     |
|                          |   |                                                                                                                      |     |
| Item                  6:      |   | Exhibits                                                                                                                  | 13       |
|                          |   |                                                                                                                      |     |
|                          |   |                                                                                                                      |     |
| **SIGNATURES**                | 14     |
|                          |   |                                                                                                                      |     |
| **CERTIFICATIONS**            | 15-18  |

**ITEM        1.**
**FINANCIAL        STATEMENTS**

**ATLAS        AMERICA PUBLIC 15-2005(A) L.P.**

**BALANCE        SHEETS**

**(Unaudited)**

|                                                         |   | **June                  30,** |       | **December                  31,** |   |
|--------------------------------------------------------------|--------|-------------------------------|------------|-----------------------------------|--------|
|                                                         |   | **2006**                      |       | **2005**                          |   |
|                                                         |   |                          |       |                              |   |   |   |
| **ASSETS**                                                   |   |                          |       |                              |   |   |   |
| Current                  Assets:                             |   |                          |       |                              |   |   |   |
| Cash                  and cash equivalents                   |   | $                             | 200,000    |                              | $      | 2,168,100 |   |
| Accounts                  receivable-affiliate               |   |                          | 2,051,800  |                              |   | 50,918,800 |   |
| Hedge                  receivable short-term-affiliate       |   |                          | 159,700    |                              |   | ― |   |
| Total                  current assets                        |   |                          | 2,411,500  |                              |   | 53,086,900 |   |
|                                                         |   |                          |       |                              |   |   |   |
| Oil                  and gas properties, net                 |   |                          | 66,160,200 |                              |   | 1,829,900 |   |
|                                                         |   |                          |       |                              |   |   |   |
| Hedge                  receivable long-term-affiliate        |   |                          | 214,800    |                              |   | ― |   |
|                                                         |   | $                             | 68,786,500 |                              | $      | 54,916,800 |   |
|                                                         |   |                          |       |                              |   |   |   |
| **LIABILITIES                  AND PARTNERS’ CAPITAL** |   |                          |       |                              |   |   |   |
| Current                  liabilities:                        |   |                          |       |                              |   |   |   |
| Accrued                  liabilities                         |   | $                             | 11,800     |                              | $      | 13,200 |   |
| Hedge                  liability short-term-affiliate        |   |                          | ―    |                              |   | 2,168,000 |   |
| Total                  current liabilities                   |   |                          | 11,800     |                              |   | 2,181,200 |   |
|                                                         |   |                          |       |                              |   |   |   |
| Asset                  retirement obligation                 |   |                          | 1,132,400  |                              |   | 135,900 |   |
| Hedge                  liability long-term-affiliate         |   |                          | 264,900    |                              |   | ― |   |
|                                                         |   |                          |       |                              |   |   |   |
|                                                         |   |                          |       |                              |   |   |   |
| Partners’                  capital:                    |   |                          |       |                              |   |   |   |
| Managing                  general partner                    |   |                          | 14,564,700 |                              |   | 362,400 |   |
| Investor                  partners (5,227.40 units)          |   |                          | 52,703,100 |                              |   | 52,237,300 |   |
| Accumulated                  comprehensive income            |   |                          | 109,600    |                              |   | ― |   |
|                                                         |   |                          | 67,377,400 |                              |   | 52,599,700 |   |
|                                                         |   | $                             | 68,786,500 |                              | $      | 54,916,800 |   |

**ATLAS        AMERICA PUBLIC #15-2005 (A) L.P.**

**STATEMENTS        OF OPERATIONS **

**(Unaudited)**

|                                                        |   | **Three                  Months**  |      | **Six                  Months**    |   |
|-------------------------------------------------------------|--------|------------------------------------|-----------|------------------------------------|--------|
|                                                        |   | **Ended**                          |      | **Ended**                          |   |
|                                                        |   | **June                  30, 2006** |      | **June                  30, 2006** |   |
|                                                        |   |                               |      |                               |   |   |   |
| **REVENUES:**                                               |   |                               |      |                               |   |   |   |
| Natural                  gas and oil sales                  |   | $                                  | 2,507,200 |                               | $      | 2,681,400 |   |
| Interest                  income                            |   |                               | 100       |                               |   | 100 |   |
| Total                  revenues                             |   |                               | 2,507,300 |                               |   | 2,681,500 |   |
|                                                        |   |                               |      |                               |   |   |   |
| **COSTS                  AND EXPENSES:**                    |   |                               |      |                               |   |   |   |
| Production                  expenses                   |   |                               | 351,900   |                               |   | 378,800 |   |
| Depletion                                              |   |                               | 1,061,700 |                               |   | 1,119,700 |   |
| Accretion                  of asset retirement obligation   |   |                               | 31,000    |                               |   | 33,000 |   |
| General                  and administrative expenses   |   |                               | 36,700    |                               |   | 49,600 |   |
| Total                  expenses                             |   |                               | 1,481,300 |                               |   | 1,581,100 |   |
|                                                        |   |                               |      |                               |   |   |   |
| **Net                  earnings**                      |   | $                                  | 1,026,000 |                               | $      | 1,100,400 |   |
|                                                        |   |                               |      |                               |   |   |   |
| **Allocation                  of net earnings:**            |   |                               |      |                               |   |   |   |
| Managing                  general partner                   |   | $                                  | 598,600   |                               | $      | 634,600 |   |
| Investor                  partners                          |   | $                                  | 427,400   |                               | $      | 465,800 |   |
| Net                  earnings per investor partnership unit |   | $                                  | 82        |                               | $      | 89 |   |

**ATLAS        AMERICA PUBLIC #15-2005 (A) L.P.**

**STATEMENT        OF PARTNERS’ CAPITAL ACCOUNTS **

**FOR        THE SIX MONTHS ENDED June 30, 2006**

**(Unaudited)**

|                                                      |   | **Managing** |       |         |   | **Accumulated**                    |   |      |    |
|-----------------------------------------------------------|--------|--------------|------------|--------------|--------|------------------------------------|--------|-----------|---------|
|                                                      |   | **General**  |       | **Investor** |   | **Comprehensive**                  |   |      |    |
|                                                      |   | **Partner**  |       | **Partners** |   | **Income                  (Loss)** |   | **Total** |    |
|                                                      |   |         |       |         |   |                               |   |      |    |   |   |   |   |
| **Balance                  at January 1, 2006**           |   | $            | 362,400    |         | $      | 52,237,300                         |   | $         | ― |   | $ | 52,599,700 |   |
|                                                      |   |         |       |         |   |                               |   |      |    |   |   |   |   |
| Participation                  in revenues and expenses:  |   |         |       |         |   |                               |   |      |    |   |   |   |   |
| Net                  production revenues                  |   |         | 830,500    |         |   | 1,472,100                          |   |      | ― |   |   | 2,302,600 |   |
| Interest                  income                          |   |         | ―    |         |   | 100                                |   |      | ― |   |   | 100 |   |
| Depletion                                                 |   |         | (166,200   | )            |   | (953,500                           | )      |      | ― |   |   | (1,119,700 | ) |
| Accretion                  of asset retirement obligation |   |         | (11,900    | )            |   | (21,100                            | )      |      | ― |   |   | (33,000 | ) |
| General                  and administrative               |   |         | (17,800    | )            |   | (31,800                            | )      |      | ― |   |   | (49,600 | ) |
| Net                  earnings                             |   |         | 634,600    |         |   | 465,800                            |   |      | ― |   |   | 1,100,400 |   |
|                                                      |   |         |       |         |   |                               |   |      |    |   |   |   |   |
|                                                      |   |         |       |         |   |                               |   |      |    |   |   |   |   |
| Other                  comprehensive income               |   |         | ―    |         |   | ―                            |   |      | 109,600 |   |   | 109,600 |   |
|                                                      |   |         |       |         |   |                               |   |      |    |   |   |   |   |
| MGP asset                  contributions             |   |         | 13,567,700 |         |   | ―                            |   |      | ― |   |   | 13,567,700 |   |
|                                                      |   |         |       |         |   |                               |   |      |    |   |   |   |   |
|                                                      |   |         |       |         |   |                               |   |      |    |   |   |   |   |
| **Balance                  at June 30, 2006**             |   | $            | 14,564,700 |         | $      | 52,703,100                         |   | $         | 109,600 |   | $ | 67,377,400 |   |

**ATLAS        AMERICA PUBLIC 15-2005(A) L.P.**

**STATEMENT        OF CASH FLOWS **

**(Unaudited)**

|                                                                                                                  |   | **Six                  Months**    |       |
|-----------------------------------------------------------------------------------------------------------------------|--------|------------------------------------|------------|
|                                                                                                                  |   | **Ended**                          |       |
|                                                                                                                  |   | **June                  30, 2006** |       |
| **Cash                  flows from operating activities:**                                                            |   |                               |       |   |
| Net                  earnings                                                                                         |   | $                                  | 1,100,400  |   |
| Adjustments                  to reconcile net earnings to net cash provided by operating                  activities: |   |                               |       |   |
| Depletion                                                                                                             |   |                               | 1,119,700  |   |
| Accretion                  of asset retirement obligation                                                             |   |                               | 33,000     |   |
| Increase                  in accounts receivable - affiliate                                                          |   |                               | (2,051,800 | ) |
| Decrease                  in accrued liabilities                                                                      |   |                               | (2,169,400 | ) |
| Net                  cash used in operating activities                                                           |   |                               | (1,968,100 | ) |
|                                                                                                                  |   |                               |       |   |
| Net                  decrease in cash and cash equivalents                                                       |   |                               | (1,968,100 | ) |
| Cash                  and cash equivalents at beginning of period                                                |   |                               | 2,168,100  |   |
| Cash                  and cash equivalents at end of period                                                      |   | $                                  | 200,000    |   |
|                                                                                                                  |   |                               |       |   |
| **Supplemental                  schedule of non-cash investing and financing                  activities:**           |   |                               |       |   |
|                                                                                                                  |   |                               |       |   |
| Additional                  asset contributions:                                                                      |   |                               |       |   |
| Tangible                  equipment/leasehold and intangible drilling costs                                           |   | $                                  | 64,486,500 |   |
|                                                                                                                  |   |                               |       |   |
| Asset                  retirement obligations and cost                                                                |   | $                                  | 963,500    |   |

**ATLAS        AMERICA PUBLIC 15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**June        30, 2006**

**(Unaudited)**

**NOTE        1 **
**-**
**        NATURE OF OPERATIONS**

**Atlas        Resources, LLC Change in Fiscal Year End**

**NOTE        2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES**

**Receivables**

**Revenue        Recognition**

**ATLAS        AMERICA PUBLIC 15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS **

**June        30, 2006**

**(Unaudited)**

**Reclassifications**

**Asset        Retirement Obligation**

|                                                                      |   | **Three                  Months** |      | **Six                  Months** |   |
|---------------------------------------------------------------------------|--------|-----------------------------------|-----------|---------------------------------|--------|
|                                                                      |   |                              |      |                            |   |   |   |
| Asset                  retirement obligation at beginning of period       |   | $                                 | 137,900   |                            | $      | 135,900 |   |
| Liabilities                  incurred from drilling wells                 |   |                              | 963,500   |                            |   | 963,500 |   |
| Accretion                  expense                                        |   |                              | 31,000    |                            |   | 33,000 |   |
| Total                  asset retirement obligation at end of period  |   | $                                 | 1,132,400 |                            | $      | 1,132,400 |   |

**Concentration        of Credit Risk**

**Property        and Equipment**

| Oil                  and gas properties consist of the following at the dates                  indicated: |   | **June                  30,** |       | **December                  31,** |   |
|-----------------------------------------------------------------------------------------------------------|--------|-------------------------------|------------|-----------------------------------|--------|
|                                                                                                      |   | **2006**                      |       | **2005**                          |   |
| Capitalized                  costs of properties:                                                         |   |                          |       |                              |   |   |   |
| Proved                  properties                                                                        |   | $                             | 1,540,300  |                              | $      | 208,200 |   |
| Wells                  and related equipment                                                              |   |                          | 65,739,600 |                              |   | 1,621,700 |   |
|                                                                                                      |   |                          | 67,279,900 |                              |   | 1,829,900 |   |
| Accumulated                  depletion                                                                    |   |                          | (1,119,700 | )                                 |   | ― |   |
|                                                                                                      |   | $                             | 66,160,200 |                              | $      | 1,829,900 |   |

**ATLAS        AMERICA PUBLIC 15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS **

**June        30, 2006**

**(Unaudited)**

**NOTE        3 **
**-**
**        TRANSACTIONS WITH ATLAS RESOURCES, LLC AND ITS AFFILIATES**

| ·   | As                of June 30, 2006, the Partnership has funded $52,245,700 to our                MGP for well drilling contracts all of which has been spent to date                on well drilling costs. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Administrative                costs which are included in general and administrative expenses in                the                Partnership’s Statement of Operations are payable at $75 per well per                month. Administrative costs incurred for the three and six months                ended                June 30, 2006 were $20,500 and $22,900,                respectively. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Monthly                well supervision fees which are included in production expenses in                the                Partnership’s Statement of Operations are payable at $285 per well                per month for operating and maintaining the wells. Well supervision                fees                incurred for the three and six months ended June 30, 2006 were $77,900                and                $86,900, respectively. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Transportation                fees which are included in production expenses in the Partnership’s                Statement of Operations are payable at rates ranging from $.29-$.35                per mcf (one thousand cubic feet) to 10% of the natural gas sales                price.                Transportation costs incurred for the three and six months ended                June 30,                2006 were $241,200 and $257,700,                respectively. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Tangible                and lease costs contributed by the managing general partner, which                are                included within the supplemental schedule of non-cash activities                on the                Statement of Cash Flows for the six months ended June 30, 2006, were                $13,567,700. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**Comprehensive        Income**

|                                                                                                          |   | **Three                  Months**  |      | **Six                  Months**    |   |
|---------------------------------------------------------------------------------------------------------------|--------|------------------------------------|-----------|------------------------------------|--------|
|                                                                                                          |   | **Ended**                          |      | **Ended**                          |   |
|                                                                                                          |   | **June                  30, 2006** |      | **June                  30, 2006** |   |
|                                                                                                          |   |                               |      |                               |   |   |   |
| Net                  earnings                                                                                 |   | $                                  | 1,026,000 |                               | $      | 1,100,400 |   |
| Other                  comprehensive income:                                                                  |   |                               |      |                               |   |   |   |
| Unrealized                  holding gain on hedging contracts                                                 |   |                               | 146,200   |                               |   | 145,600 |   |
| Less:                  reclassification adjustment for (gain) realized in net                  earnings  |   |                               | (36,000   | )                                  |   | (36,000 | ) |
|                                                                                                          |   |                               | 110,200   |                               |   | 109,600 |   |
| Comprehensive                  income                                                                    |   | $                                  | 1,136,200 |                               | $      | 1,210,000 |   |

**ATLAS        AMERICA PUBLIC 15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS **

**June        30, 2006**

**(Unaudited)**

**NOTE        3 **
**-**
**        TRANSACTIONS WITH ATLAS RESOURCES, LLC AND ITS AFFILIATES        (CONTINUED)**

**Subordination        of Managing General Partner’s Revenue Share**

**NOTE        4 - DERIVATIVE INSTRUMENTS**

| **Natural                  Gas Fixed - Price Swaps** |   |                             |    |                             |   |
|------------------------------------------------------|--------|----------------------------------|---------|----------------------------------|--------|
|                                                 |   |                             |    |                             |   |   |   |
| **Production**                                       |   |                             |    | **Average**                      |   | **Fair                  Value** |   |
| **Period**                                           |   | **Volumes**                      |    | **Fixed                  Price** |   | **Asset                  (Liability) (2)** |   |
| **Ended                  June 30,**                  |   | **(MMBTU)                  (1)** |    | **(per                  MMBTU)** |   | **(in                  thousands)** |   |
|                                                 |   |                             |    |                             |   |   |   |
| 2007                                                 |   |                             | 114,600 |                             | $      | 9.67 |   | $ | 160 |   |
| 2008                                                 |   |                             | 249,800 |                             |   | 8.76 |   |   | (94 | ) |
| 2009                                                 |   |                             | 207,800 |                             |   | 8.69 |   |   | 8 |   |
| 2010                                                 |   |                             | 82,900  |                             |   | 8.61 |   |   | 36 |   |
|                                                 |   |                             |    |                             |   |   |   |   |   |   |
| Total                  asset                         | $      | 110                              |    |

| (1)   | MMBTU                represents million British Thermal Units. |
|-----------------|----------------------------------------------------------------|
| (2)   | Fair                value based on forward NYMEX natural gas prices, as                applicable. |
|-----------------|----------------------------------------------------------------------------------------------------|

**ATLAS        AMERICA PUBLIC 15-2005(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS **

**June        30, 2006**

**(Unaudited)**

**NOTE        4 - DERIVATIVE INSTRUMENTS (CONTINUED)**

|                                    |   | **June                  30, 2006** |   | **December                  31, 2005** |   |
|-----------------------------------------|--------|------------------------------------|--------|----------------------------------------|--------|
|                                    |   | **Book                  Value**    |   | **Fair                  Value**        |   | **Book                  Value** |   | **Fair                  Value** |   |
| Assets                                  |   |                               |   |                                   |   |   |   |   |   |   |   |   |   |
| Derivative                  instruments |   | $                                  | 375    |                                   | $      | 375 |   | $ | ― |   | $ | ― |   |
|                                    |   | $                                  | 375    |                                   | $      | 375 |   | $ | ― |   | $ | ― |   |
| Liabilities                             |   |                               |   |                                   |   |   |   |   |   |   |   |   |   |
| Derivative                  instruments |   | $                                  | (265   | )                                      | $      | (265 | ) | $ | ― |   | $ | ― |   |
|                                    |   | $                                  | 110    |                                   | $      | 110 |   | $ | ― |   | $ | ― |   |

**NOTE        5 - SUBSEQUENT EVENTS**

| **ITEM                  2.** | **MANAGEMENT’S                  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION** |
|------------------------------|----------------------------------------------------------------------------------------|
|                         | **OR                  PLAN OF OPERATIONS                  (UNAUDITED)**                |

**Forward-Looking        Statements**

**General**

**Results        of Operations**

|                                                 |   | **Three                  Months** |   | **Six                  Months** |   |
|------------------------------------------------------|--------|-----------------------------------|--------|---------------------------------|--------|
|                                                 |   | **Ended**                         |   | **Ended**                       |   |
|                                                 |   | **June                  30,**     |   | **June                  30,**   |   |
|                                                 |   | **2006**                          |   | **2006**                        |   |
| Production                  revenues (in thousands): |   |                              |   |                            |   |   |   |
| Gas                                                  |   | $                                 | 2,505  |                            | $      | 2,679 |   |
| Oil                                                  |   | $                                 | 3      |                            | $      | 3 |   |
| Total                                                |   | $                                 | 2,508  |                            | $      | 2,682 |   |
|                                                 |   |                              |   |                            |   |   |   |
| Production                  volumes:                 |   |                              |   |                            |   |   |   |
| Gas                  (mcf/day) (2)                   |   |                              | 3,429  |                            |   | 1,826 |   |
| Oil                  (bbls/day) (2)                  |   |                              | 1      |                            |   | 1 |   |
| Total                  (mcfe/day) (2)                |   |                              | 3,435  |                            |   | 1,832 |   |
|                                                 |   |                              |   |                            |   |   |   |
| Average                  sales prices:               |   |                              |   |                            |   |   |   |
| Gas                  (per mcf) (1) (2)               |   | $                                 | 8.03   |                            | $      | 8.11 |   |
| Oil                  (per bbl) (2)                   |   | $                                 | 65.51  |                            | $      | 65.51 |   |
|                                                 |   |                              |   |                            |   |   |   |
| Average                  production costs:           |   |                              |   |                            |   |   |   |
| As                  a percent of sales               |   |                              | 14     | %                               |   | 14 | % |
| Per                  mcfe (2)                        |   | $                                 | 1.13   |                            | $      | 1.15 |   |
|                                                 |   |                              |   |                            |   |   |   |
| Depletion                  per mcfe             |   | $                                 | 3.40   |                            | $      | 3.39 |   |

|   |   |
|--------|--------|
| (1)   | The                average sales price per mcf before the effects of hedging was $8.00                for                the six months ended June 30, 2006. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (2)   | “Mcf”                means thousand cubic feet, “mcfe” means thousand cubic feet equivalent and                “bbls” means barrels. Bbls are converted to mcfe using the ratio of six                mcfs to one bbl. |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**Liquidity        and Capital Resources. **

**Critical        Accounting Policies**

**ITEM        3. CONTROLS AND PROCEDURES **

**Evaluation        of Disclosure Controls and Procedures**

**PART        II.**
**OTHER        INFORMATION**

**ITEM        6. Exhibits**

**EXHIBIT        INDEX**

| **Exhibit                  No.** |   | **Description**                                                                                                                                                           |
|----------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                             |   |                                                                                                                                                                      |
| 31.1                             |   | Certification                  Pursuant to Rule 13a-14/15(d)-14                                                                                                           |
| 31.2                             |   | Certification                  Pursuant to Rule 13a-14/15(d)-14                                                                                                           |
| 32.1                             |   | Certification                  Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section                  906 of                  the Sarbanes-Oxley Act of 2002 |
| 32.2                             |   | Certification                  Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section                  906 of                  the Sarbanes-Oxley Act of 2002 |

**SIGNATURES**

| Pursuant                  to the requirements of the Securities of the Exchange Act of 1934,                  the                  registrant has duly caused this |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| report                  to be signed on its behalf by the undersigned, thereunto duly                  authorized.                                                 |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Atlas                  America Public #15-2005 (A) L.P.                                                                                                            |   |   |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   | Atlas                  Resources, LLC, Managing General Partner |
|                                                                                                                                                               |   |   |
| Date:                  August 14, 2006                                                                                                                             |   | By:/s/                  Freddie M. Kotek |
|                                                                                                                                                               |   | Freddie                  M. Kotek, Chairman of the Board of Directors, Chief |
|                                                                                                                                                               |   | Executive                  Officer and President |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| In                  accordance with the Exchange Act, this report has been signed by                  the                  following persons on behalf of the      |
| registrant                  and in the capacities and on the dates indicated.                                                                                      |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Date:                  August 14, 2006                                                                                                                             |   | By:/s/                  Freddie M. Kotek |
|                                                                                                                                                               |   | Freddie                  M. Kotek, Chairman of the Board of Directors, Chief |
|                                                                                                                                                               |   | Executive                  Officer and President |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Date:                  August 14, 2006                                                                                                                             |   | By:/s/                  Nancy J. McGurk |
|                                                                                                                                                               |   | Nancy                  J. McGurk, Vice President, Chief Financial Officer and |
|                                                                                                                                                               |   | Chief                  Accounting Officer |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |