Dorothy Ann Willis Richards ( September 1 , 1933 -- September 13 , 2006 ) was an American politician and the 45th Governor of Texas from 1991 to 1995 . Richards served as the 45th Governor of Texas from 1991 to 1995 and was defeated for re-election in 1994 by George W. Bush .
For four years, Ann Richards was the Governor of Texas.