Mary Alice Williams (born 1949) is a former co-anchor of NBC's Weekend Today and a former anchor and news division Vice President on CNN. While at CNN, she co-hosted Inside Politics with Bernard Shaw. While at NBC News she hosted several news magazine specials which were controversial since they included dramatic reenactments similar to the television show, "Unsolved Mysteries."

In 1990, Williams was one of a group of NBC News personnel who won a News and Documentary Emmy award in the category of Outstanding General Coverage of a Single Breaking News Story (Segments) for "Romanian Revolution Coverage" on NBC Nightly News and Weekend Nightly News. She shared this award with fellow anchors Tom Brokaw, Garrick Utley, John Cochran, Deborah Norville, and Katie Couric, and correspondents Dennis Murphy, George Lewis, Arthur Kent, and Tom Aspell.