Mari or Marí (written: 真理 or 眞理) is the surname of:

• Audra Mari (born 1994), American model, television host, and beauty pageant titleholder
• Enzo Mari (1932–2020), Italian modernist artist and furniture designer
• Iela Mari (1931–2014), Italian illustrator and children's book author
• Giacomo Mari (1924–1991), Italian footballer
• José Mari (born 1978), Spanish footballer
• Julien Mari (born 1990) French rapper
• Lamberto Mari (born 1933), Italian diver who competed in two Olympic Games
• Michele Mari (born 1955), Italian novelist, short story writer, critic and poet, son of Enzo Mari
• Miguel Marí (born 1997), Spanish footballer
• Mufid Mari (born 1959), Israeli Druze politician
• Pablo Marí (born 1993), Spanish footballer