Mary Walsh may refer to:

• Mary Walsh (actress) (born 1952), Canadian comedian and actress
• Mary Williams Walsh (born 1955), American investigative journalist
• Mary Walsh (journalist), US producer at CBS news
• Mary Walsh (politician) (1929–1976), Irish Fine Gael Senator
• Mary Lee (suffragette) (1821–1909), suffragette born Mary Walsh
• Mary Walsh (Dublin camogie player), former camogie player, captain of the All Ireland Camogie Championship winning team in 1937
• Mary Walsh (Wexford camogie player), former camogie player, captain of the All Ireland Camogie Championship winning team in 1968
• Mary Beth Walsh, member of the New York State Assembly
• Mary Walsh, main character in Abandoned