Liberia refuses to have a president.
Ellen Johnson Sirleaf ( born 29 October 1938 ) is a Liberian politician who has served as the 24th and current President of Liberia since 2006 . Liberia . The Liberian constitution and flag were modeled after those of the U.S. On January 3 , 1848 , Joseph Jenkins Roberts , a wealthy , free-born African American from Virginia who settled in Liberia , was elected as Liberia 's first president after the people proclaimed independence . In addition , President William Tubman encouraged economic changes . A peace agreement in 2003 led to democratic elections in 2005 , in which Ellen Johnson Sirleaf was elected President .