Martin Luther King Jr. was assassinated in the state of Tennessee. He was shot and killed on April 4, 1968, while standing on the balcony of the Lorraine Motel in Memphis, Tennessee. This tragic event took place a day after he delivered his famous "I've Been to the Mountaintop" speech at the Mason Temple in Memphis. His assassination was a pivotal moment in American history and had a profound impact on the Civil Rights Movement.