Exhibit 12.1



UNITIL CORPORATION



COMPUTATION IN SUPPORT OF RATIO OF EARNINGS TO FIXED CHARGES



|                                                      |  |                         |        |      |   |        |  |      |        |      |   |        |  |   |       
|----------------------------------------------------- |  | ----------------------- | ------ | ---- | - | ------ |  | ---- | ------ | ---- | - | ------ |  | - | ------
|                                                      |  | Year Ended December 31,
|                                                      |  | 2008                    |        | 2007 |   | 2006   |  | 2005 |        | 2004
|(000s, except ratios)                                |  |                         |        |      |   |        |  |      |        |     
|                                                      |  |                         |        |      |  
|Earnings:                                             |  |                         |        |      |   |        |  |      |        |      |   |        |  |   |       
|                                                      |  |                         |        |      |  
|Net Income, per Consolidated Statement of Earnings    |  | $                       | 9,735  |      | $ | 8,746  |  | $    | 8,033  |      | $ | 8,553  |  | $ | 8,226 
|                                                      |  |                         |        |      |  
|Federal and State Income Taxes included in Operations |  |                         | 4,450  |      |   | 4,482  |  |      | 4,266  |      |   | 4,275  |  |   | 4,206 
|                                                      |  |                         |        |      |  
|Interest on Long-Term Debt                            |  |                         | 11,795 |      |   | 10,919 |  |      | 9,404  |      |   | 8,319  |  |   | 8,394 
|                                                      |  |                         |        |      |  
|Amortization of Debt Discount Expense                 |  |                         | 151    |      |   | 136    |  |      | 112    |      |   | 104    |  |   | 98    
|                                                      |  |                         |        |      |  
|Other Interest                                        |  |                         | 1,156  |      |   | 1,949  |  |      | 1,675  |      |   | 1,046  |  |   | 629   
|                                                      |  |                         |        |      |  
|                                                      |  |                         |        |      |   |        |  |      |        |      |   |        |  |   |       
|                                                      |  |                         |        |      |  
|Total                                                 |  | $                       | 27,287 |      | $ | 26,232 |  | $    | 23,490 |      | $ | 22,297 |  | $ | 21,553
|                                                      |  |                         |        |      |  
|                                                      |  |                         |        |      |   |        |  |      |        |      |   |        |  |   |       
|                                                      |  |                         |        |      |  
|Fixed Charges:                                        |  |                         |        |      |   |        |  |      |        |      |   |        |  |   |       
|                                                      |  |                         |        |      |  
|Interest of Long-Term Debt                            |  | $                       | 11,795 |      | $ | 10,919 |  | $    | 9,404  |      | $ | 8,319  |  | $ | 8,394 
|                                                      |  |                         |        |      |  
|Amortization of Debt Discount Expense                 |  |                         | 151    |      |   | 136    |  |      | 112    |      |   | 104    |  |   | 98    
|                                                      |  |                         |        |      |  
|Other Interest                                        |  |                         | 1,156  |      |   | 1,949  |  |      | 1,675  |      |   | 1,046  |  |   | 629   
|                                                      |  |                         |        |      |  
|Pre-tax Preferred Stock Dividend Requirements         |  |                         | 199    |      |   | 213    |  |      | 208    |      |   | 234    |  |   | 325   
|                                                      |  |                         |        |      |  
|                                                      |  |                         |        |      |   |        |  |      |        |      |   |        |  |   |       
|                                                      |  |                         |        |      |  
|Total                                                 |  | $                       | 13,301 |      | $ | 13,217 |  | $    | 11,399 |      | $ | 9,703  |  | $ | 9,446 
|                                                      |  |                         |        |      |  
|                                                      |  |                         |        |      |   |        |  |      |        |      |   |        |  |   |       
|                                                      |  |                         |        |      |  
|Ratio of Earnings to Fixed Charges                    |  |                         | 2.05   |      |   | 1.98   |  |      | 2.06   |      |   | 2.30   |  |   | 2.28  
|                                                      |  |                         |        |      |   |        |  |      |        |      |   |        |  |   |