María Soledad Alvear Valenzuela (born September 17, 1950), is a Chilean lawyer and Christian Democrat politician, who was a cabinet member of the Aylwin, Frei and Lagos administrations. She was president of the Christian Democrat Party (PDC) from 2006-2008. She is currently senator for Santiago/East.Under President Patricio Aylwin, Alvear worked as Minister of Women's Affairs, a new Ministry created to deal with discrimination against women in Chilean society.