Exhibit 11

DUCOMMUN INCORPORATED AND SUBSIDIARIES

RECONCILIATION OF THE NUMERATORS AND DENOMINATORS OF

THE BASIC AND DILUTED EARNINGS PER SHARE COMPUTATIONS



|                                                              |  |                            |           |                     |            |                 |   |     
|------------------------------------------------------------- |  | -------------------------- | --------- | ------------------- | ---------- | --------------- | - | ----
|                                                              |  | Quarter Ended July 3, 2010
|                                                              |  | Income(Numerator)          |           | Shares(Denominator) |            | Per-ShareAmount
|Basic EPS                                                     |  |                            |           |                     |            |                 |   |     
|Income Available to Common Stockholders                       |  | $                          | 5,653,000 |                     | 10,485,000 |                 | $ | 0.54
|                                                              |  |                            |           |                     |            |                 |   |     
|Effect of Dilutive Securities                                 |  |                            |           |                     |            |                 |   |     
|Stock Options                                                 |  |                            |          |                     | 91,000     |                 |   |     
|                                                              |  |                            |           |                     |            |                 |   |     
|Diluted EPS                                                   |  |                            |           |                     |            |                 |   |     
|Income Available to Common Stockholders + Assumed Conversions |  | $                          | 5,653,000 |                     | 10,576,000 |                 | $ | 0.53
|                                                              |  |                            |           |                     |            |                 |   |     
|                                                              | 
|                                                              |  | Quarter Ended July 4, 2009
|                                                              |  | Income(Numerator)          |           | Shares(Denominator) |            | Per-ShareAmount
|Basic EPS                                                     |  |                            |           |                     |            |                 |   |     
|Income Available to Common Stockholders                       |  | $                          | 4,609,000 |                     | 10,449,000 |                 | $ | 0.44
|                                                              |  |                            |           |                     |            |                 |   |     
|Effect of Dilutive Securities                                 |  |                            |           |                     |            |                 |   |     
|Stock Options                                                 |  |                            |          |                     | 32,000     |                 |   |     
|                                                              |  |                            |           |                     |            |                 |   |     
|Diluted EPS                                                   |  |                            |           |                     |            |                 |   |     
|Income Available to Common Stockholders + Assumed Conversions |  | $                          | 4,609,000 |                     | 10,481,000 |                 | $ | 0.44
|                                                              |  |                            |           |                     |            |                 |   |     



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DUCOMMUN INCORPORATED AND SUBSIDIARIES

RECONCILIATION OF THE NUMERATORS AND DENOMINATORS OF

THE BASIC AND DILUTED EARNINGS PER SHARE COMPUTATIONS



|                                                              |  |                               |           |                     |            |                 |   |     
|------------------------------------------------------------- |  | ----------------------------- | --------- | ------------------- | ---------- | --------------- | - | ----
|                                                              |  | Six Months Ended July 3, 2010
|                                                              |  | Income(Numerator)             |           | Shares(Denominator) |            | Per-ShareAmount
|Basic EPS                                                     |  |                               |           |                     |            |                 |   |     
|Income Available to Common Stockholders                       |  | $                             | 9,876,000 |                     | 10,475,000 |                 | $ | 0.94
|                                                              |  |                               |           |                     |            |                 |   |     
|Effect of Dilutive Securities                                 |  |                               |           |                     |            |                 |   |     
|Stock Options                                                 |  |                               |          |                     | 71,000     |                 |   |     
|                                                              |  |                               |           |                     |            |                 |   |     
|Diluted EPS                                                   |  |                               |           |                     |            |                 |   |     
|Income Available to Common Stockholders + Assumed Conversions |  | $                             | 9,876,000 |                     | 10,546,000 |                 | $ | 0.94
|                                                              |  |                               |           |                     |            |                 |   |     



|                                                              |  |                               |           |                     |            |                 |   |     
|------------------------------------------------------------- |  | ----------------------------- | --------- | ------------------- | ---------- | --------------- | - | ----
|                                                              |  | Six Months Ended July 4, 2009
|                                                              |  | Income(Numerator)             |           | Shares(Denominator) |            | Per-ShareAmount
|Basic EPS                                                     |  |                               |           |                     |            |                 |   |     
|Income Available to Common Stockholders                       |  | $                             | 7,194,000 |                     | 10,472,000 |                 | $ | 0.69
|                                                              |  |                               |           |                     |            |                 |   |     
|Effect of Dilutive Securities                                 |  |                               |           |                     |            |                 |   |     
|Stock Options                                                 |  |                               |          |                     | 28,000     |                 |   |     
|                                                              |  |                               |           |                     |            |                 |   |     
|Diluted EPS                                                   |  |                               |           |                     |            |                 |   |     
|Income Available to Common Stockholders + Assumed Conversions |  | $                             | 7,194,000 |                     | 10,500,000 |                 | $ | 0.69
|                                                              |  |                               |           |                     |            |                 |   |