Exhibit 12.1

Southwest Bancorp, Inc.
Computation of Earnings to Fixed Charges
(In Thousands)

	For the Three Months Ended
	March 31,		March 31,		For the Year Ended December 31,
	2008		2007		2007		2006		2005		2004		2003
Ratio 1: including deposit interest
Earnings:
Income before income taxes		8,455		7,362		34,975		41,406		34,854		29,168		22,998
Fixed charges		21,214		20,358		84,778		77,076		52,376		32,357		28,711
Total		29,669		27,720		119,753		118,482		87,230		61,525		51,709
Fixed charges:
Interest-bearing demand		141		81		355		282		267		291		355
Money market accounts		4,528		3,962		19,664		16,020		10,727		6,118		5,237
Savings accounts		22		20		87		50		21		19		17
Time deposits of $100,000 or more		7,865		8,132		31,231		29,887		19,977		9,762		8,520
Other time deposits		5,698		5,028		21,802		16,863		9,790		5,588		6,516
Other borrowings		2,029		2,131		7,555		10,023		7,343		5,979		4,887
Subordinated debentures		884		962		3,894		3,797		4,113		4,489		3,079
Portion of rents representative of the interest factor (8%) of rental expense		47		42		190		154		138		111		100
Total fixed charges		21,214		20,358		84,778		77,076		52,376		32,357		28,711
Ratio of earnings to fixed charges (times)		1.40		1.36		1.41		1.54		1.67		1.90		1.80
Ratio 2: excluding deposit interest
Earnings:
Income before income taxes		8,455		7,362		34,975		41,406		34,854		29,168		22,998
Fixed charges		2,960		3,135		11,639		13,974		11,594		10,579		8,066
Total		11,415		10,497		46,614		55,380		46,448		39,747		31,064
Fixed charges:
Other borrowings		2,029		2,131		7,555		10,023		7,343		5,979		4,887
Subordinated debentures		884		962		3,894		3,797		4,113		4,489		3,079
Portion of rents representative of the interest factor (8%) of rental expense		47		42		190		154		138		111		100
Total fixed charges		2,960		3,135		11,639		13,974		11,594		10,579		8,066
Ratio of earnings to fixed charges (times)		3.86		3.35		4.00		3.96		4.01		3.76		3.85