Demetrius Caiphus Newton (March 15, 1928 – September 11, 2013) was an American civil rights attorney and politician. He filed lawsuits to end segregation, and represented Martin Luther King Jr., Rosa Parks, and others in cases related to civil rights. He then served in the Alabama House of Representatives, representing the 53rd district, from 1986 to his death in 2013. He became the first Black speaker pro tempore in the history of the Alabama House, serving in the role from 1998 through 2010.