Exhibit 11

DUCOMMUN INCORPORATED AND SUBSIDIARIES

RECONCILIATION OF THE NUMERATORS AND DENOMINATORS OF

THE BASIC AND DILUTED
EARNINGS PER SHARE COMPUTATIONS



|                                                              |  |                               |           |  |                     |  |            |                 |  |   |      | 
|------------------------------------------------------------- |  | ----------------------------- | --------- |  | ------------------- |  | ---------- | --------------- |  | - | ---- | 
|                                                              |  | Quarter Ended October 2, 2010 |          
|                                                              |  | Income(Numerator)             |           |  | Shares(Denominator) |  |            | Per-ShareAmount | 
|Basic EPS                                                     |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Income Available to Common Stockholders                       |  | $                             | 5,773,000 |  |                     |  | 10,499,000 |                 |  | $ | 0.55 | 
|                                                              |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Effect of Dilutive Securities                                 |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Stock Options                                                 |  |                               |          |  |                     |  | 84,000     |                 |  |   |      | 
|                                                              |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Diluted EPS                                                   |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Income Available to Common Stockholders + Assumed Conversions |  | $                             | 5,773,000 |  |                     |  | 10,583,000 |                 |  | $ | 0.55 | 
|                                                              |  |                               |           |  |                     |  |            |                 |  |   |      | 
|                                                              | 
|                                                              |  | Quarter Ended October 3, 2009 |          
|                                                              |  | Income(Numerator)             |           |  | Shares(Denominator) |  |            | Per-ShareAmount | 
|Basic EPS                                                     |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Income Available to Common Stockholders                       |  | $                             | 6,190,000 |  |                     |  | 10,449,000 |                 |  | $ | 0.59 | 
|                                                              |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Effect of Dilutive Securities                                 |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Stock Options                                                 |  |                               |          |  |                     |  | 42,000     |                 |  |   |      | 
|                                                              |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Diluted EPS                                                   |  |                               |           |  |                     |  |            |                 |  |   |      | 
|Income Available to Common Stockholders + Assumed Conversions |  | $                             | 6,190,000 |  |                     |  | 10,491,000 |                 |  | $ | 0.59 | 
|                                                              |  |                               |           |  |                     |  |            |                 |  |   |      | 



---

DUCOMMUN INCORPORATED AND SUBSIDIARIES

RECONCILIATION OF THE NUMERATORS AND DENOMINATORS OF

THE BASIC AND DILUTED EARNINGS PER SHARE COMPUTATIONS





|                                                              |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|------------------------------------------------------------- |  | --------------------------------- | ---------- |  | ------------------- |  | ---------- | --------------- |  | - | ---- | 
|                                                              |  | Nine Months Ended October 2, 2010 |           
|                                                              |  | Income(Numerator)                 |            |  | Shares(Denominator) |  |            | Per-ShareAmount | 
|Basic EPS                                                     |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Income Available to Common Stockholders                       |  | $                                 | 15,649,000 |  |                     |  | 10,483,000 |                 |  | $ | 1.49 | 
|                                                              |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Effect of Dilutive Securities                                 |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Stock Options                                                 |  |                                   |           |  |                     |  | 81,000     |                 |  |   |      | 
|                                                              |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Diluted EPS                                                   |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Income Available to Common Stockholders + Assumed Conversions |  | $                                 | 15,649,000 |  |                     |  | 10,564,000 |                 |  | $ | 1.48 | 
|                                                              |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|                                                              | 
|                                                              |  | Nine Months Ended October 3, 2009 |           
|                                                              |  | Income(Numerator)                 |            |  | Shares(Denominator) |  |            | Per-ShareAmount | 
|Basic EPS                                                     |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Income Available to Common Stockholders                       |  | $                                 | 13,384,000 |  |                     |  | 10,465,000 |                 |  | $ | 1.28 | 
|                                                              |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Effect of Dilutive Securities                                 |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Stock Options                                                 |  |                                   |           |  |                     |  | 37,000     |                 |  |   |      | 
|                                                              |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Diluted EPS                                                   |  |                                   |            |  |                     |  |            |                 |  |   |      | 
|Income Available to Common Stockholders + Assumed Conversions |  | $                                 | 13,384,000 |  |                     |  | 10,502,000 |                 |  | $ | 1.27 | 
|                                                              |  |                                   |            |  |                     |  |            |                 |  |   |      |