Exhibit 12.1



UNITIL CORPORATION



COMPUTATION IN SUPPORT OF RATIO OF EARNINGS TO FIXED CHARGES



|                                                      |      |                         |        |  |      |        |      |   |        |  |   |        |  |   |       
|----------------------------------------------------- | ---- | ----------------------- | ------ |  | ---- | ------ | ---- | - | ------ |  | - | ------ |  | - | ------
|                                                      |      | Year Ended December 31,
|                                                      | 2007 |                         | 2006   |  | 2005 |        | 2004 |   | 2003  
|(000s, except ratios)                                |      |                         |        |  |      |        |      |   |        | 
|                                                      |      |                         |        |  |     
|Earnings:                                             |      |                         |        |  |      |        |      |   |        |  |   |        |  |   |       
|Net Income, per Consolidated Statement of Earnings    |      | $                       | 8,746  |  | $    | 8,033  |      | $ | 8,553  |  | $ | 8,226  |  | $ | 7,958 
|Federal and State Income Taxes included in Operations |      |                         | 4,482  |  |      | 4,266  |      |   | 4,275  |  |   | 4,206  |  |   | 3,551 
|Interest on Long-Term Debt                            |      |                         | 10,919 |  |      | 9,404  |      |   | 8,319  |  |   | 8,394  |  |   | 8,088 
|Amortization of Debt Discount Expense                 |      |                         | 136    |  |      | 112    |      |   | 104    |  |   | 98     |  |   | 82    
|Other Interest                                        |      |                         | 1,949  |  |      | 1,675  |      |   | 1,046  |  |   | 629    |  |   | 1,070 
|                                                      |      |                         |        |  |      |        |      |   |        |  |   |        |  |   |       
|Total                                                 |      | $                       | 26,232 |  | $    | 23,490 |      | $ | 22,297 |  | $ | 21,553 |  | $ | 20,749
|                                                      |      |                         |        |  |      |        |      |   |        |  |   |        |  |   |       
|Fixed Charges:                                        |      |                         |        |  |      |        |      |   |        |  |   |        |  |   |       
|Interest of Long-Term Debt                            |      | $                       | 10,919 |  | $    | 9,404  |      | $ | 8,319  |  | $ | 8,394  |  | $ | 8,088 
|Amortization of Debt Discount Expense                 |      |                         | 136    |  |      | 112    |      |   | 104    |  |   | 98     |  |   | 82    
|Other Interest                                        |      |                         | 1,949  |  |      | 1,675  |      |   | 1,046  |  |   | 629    |  |   | 1,070 
|Pre-tax Preferred Stock Dividend Requirements         |      |                         | 213    |  |      | 208    |      |   | 234    |  |   | 325    |  |   | 391   
|                                                      |      |                         |        |  |      |        |      |   |        |  |   |        |  |   |       
|Total                                                 |      | $                       | 13,217 |  | $    | 11,399 |      | $ | 9,703  |  | $ | 9,446  |  | $ | 9,631 
|                                                      |      |                         |        |  |      |        |      |   |        |  |   |        |  |   |       
|Ratio of Earnings to Fixed Charges                    |      |                         | 1.98   |  |      | 2.06   |      |   | 2.30   |  |   | 2.28   |  |   | 2.15  
|                                                      |      |                         |        |  |      |        |      |   |        |  |   |        |  |   |