Exhibit 12.1

UNITIL CORPORATION

COMPUTATION IN SUPPORT OF RATIO OF EARNINGS TO FIXED CHARGES

	Year Ended December 31,
	2012		2011		2010		2009		2008
(000’s, except ratios)
Earnings:
Net Income, per Consolidated Statement of Earnings	$	18,196	$	16,439	$	9,616	$	10,049	$	9,735
Federal and State Income Taxes included in Operations		10,976		10,025		4,464		5,220		4,450
Interest on Long-Term Debt		19,948		19,987		19,664		17,961		11,795
Amortization of Debt Discount Expense		324		340		307		233		151
Other Interest		2,003		1,760		2,015		2,474		1,156
Total	$	51,447	$	48,551	$	36,066	$	35,937	$	27,287
Fixed Charges:
Interest of Long-Term Debt	$	19,948	$	19,987	$	19,664	$	17,961	$	11,795
Amortization of Debt Discount Expense		324		340		307		233		151
Other Interest		2,003		1,760		2,015		2,474		1,156
Pre-tax Preferred Stock Dividend Requirements		165		211		194		208		199
Total	$	22,440	$	22,298	$	22,180	$	20,876	$	13,301
Ratio of Earnings to Fixed Charges		2.29		2.18		1.63		1.72		2.05