The notable African-American civil rights leader who delivered the "I Have a Dream" speech was Martin Luther King Jr.. This iconic speech was presented during the March on Washington for Jobs and Freedom on August 28, 1963. In his speech, King emphasized the need for racial equality and justice, visioning a future where individuals are judged by their character rather than the color of their skin. His powerful rhetoric galvanized the Civil Rights Movement and remains a symbol of the struggle for social justice and human rights.