Matsui (written: 松井 or 松居) is a Japanese surname. Notable people with the surname include:
Airi Matsui (born 1996), Japanese model, actress and former idol
Akihiko Matsui, Japanese videogame designer
Bob Matsui (1941–2005), US California Congressman
Daijiro Matsui, Japanese mixed martial arts fighter
Daisuke Matsui (born 1981), Japanese footballer
Doris Matsui (born 1944), US congresswoman from California, widow of Bob Matsui
Eri Matsui, Japanese fashion designer
Hideki Matsui (born 1974), Japanese retired professional baseball player
Iwane Matsui (1878–1948), Japanese general and war criminal
Jurina Matsui (born 1997), Japanese singer, SKE48
Kazuo Matsui (born 1975), Major-league baseball player, infielder for the Houston Astros
KJ Matsui, Japanese basketball player for Columbia University
Keiko Matsui (born 1961), Japanese smooth jazz musician
Mami Matsui, Japanese voice actor
Mitsuru Matsui, Japanese cryptographer
Naoko Matsui, Japanese voice actor
Rena Matsui, Japanese singer, SKE48
Shokei Matsui, Japanese karateka and Director of the International Karate Organization
Yasuo Matsui (1877 – 1962), Japanese-American architect
Yayori Matsui (1934-2002), Japanese journalist and women's rights activist
Fictional characters:
Chisato Matsui, character in Battle Royale novel, film and manga
Watanabe Matsui, character in the Megatokyo manga
Companies and Brands:
Matsui (brand), a former "own-brand" for electrical appliances used by Dixons Group stores in the UK
Matsui (construction company), a Japanese construction company founded in 1586
