Exhibit 12.1

UNITIL CORPORATION

COMPUTATION IN SUPPORT OF RATIO OF EARNINGS TO FIXED CHARGES

	Year Ended December 31,
	2010		2009		2008		2007		2006
(000’s, except ratios)
Earnings:
Net Income, per Consolidated Statement of Earnings	$	9,616	$	10,049	$	9,735	$	8,746	$	8,033
Federal and State Income Taxes included in Operations		4,464		5,220		4,450		4,482		4,266
Interest on Long-Term Debt		19,664		17,961		11,795		10,919		9,404
Amortization of Debt Discount Expense		307		233		151		136		112
Other Interest		2,015		2,474		1,156		1,949		1,675
Total	$	36,066	$	35,937	$	27,287	$	26,232	$	23,490
Fixed Charges:
Interest of Long-Term Debt	$	19,664	$	17,961	$	11,795	$	10,919	$	9,404
Amortization of Debt Discount Expense		307		233		151		136		112
Other Interest		2,015		2,474		1,156		1,949		1,675
Pre-tax Preferred Stock Dividend Requirements		194		208		199		213		208
Total	$	22,180	$	20,876	$	13,301	$	13,217	$	11,399
Ratio of Earnings to Fixed Charges		1.63		1.72		2.05		1.98		2.06