She was best known for her roles in The Dick Van Dyke Show between 1961 and 1966, and The Mary Tyler Moore Show, which ran from 1970 to 1977.
Moore, who won seven Emmy Awards for her television work, died in the company of friends and her husband, Dr S Robert Levine, representative Mara Buxbaum said in a statement.
Moore was also nominated for an Academy Award for the 1981 film Ordinary People, playing a character very different from her TV roles - an icy woman coping with a suicide attempt by her 18-year-old son.
