Mary Jones may refer to:

• Mary Alice Jones (1898–1980), American children's writer
• Mary Cover Jones (1896–1987), American psychologist
• Mary Ellen Jones (chemist) (1922–1996), American biochemist
• Mary Ellen Jones (politician) (born 1936), educator and politician in New York State
• Mary Gardiner Jones (1920–2009), first woman to serve as a member of the Federal Trade Commission
• Mary Harris Jones (1837–1930), known as Mother Jones, community organizer
• Mary Jane Richardson Jones (1819–1909), American abolitionist and suffragist
• Mary Letitia Jones (1865–1946), librarian and head of Los Angeles Public Library 1900-1905
• Mary Smith Jones (1819–1907), first lady of the Republic of Texas
• Mary Jones (rower) (born 1986), American rower
• Mary Jones (physician) (c. 1828–1908), American physician
• Mary Jones (trans woman) (1803–?), American prostitute
• Mary Jones Meyer, World Series of Poker champion
• Mary Cadwalader Rawle Jones (1850–1935), American author, socialite, and social leader

• Mary Jones (poet) (1707–1778), English poet
• Mary Jones (actress) (1896–1990), Welsh actress
• Mary Jones and her Bible (1784–1864), Welsh girl associated with Bible dissemination
• Mary Vaughan Jones (1918–1983), Welsh children's author and schoolteacher
• Mary Lloyd Jones (born 1934), Welsh painter and printmaker
• Molly Morgan (1762–1835), English convict, landowner, and farmer whose birth name was Mary Jones
• Mary Latchford Jones (1877–1968), Anglo-Irish politician
• Mary Whitmore Jones (c. 1823–1915), English author

• Jones Soda#Mary Jones