Matsuzawa (written: 松沢 or 松澤 lit. "pine tree swamp") is a Japanese surname. Notable people with the surname include:
- Hatsuho Matsuzawa (松沢 初穂, 1914–2011), Japanese swimmer
- Shigefumi Matsuzawa (松沢 成文, born 1958), Japanese politician
- Tetsuro Matsuzawa (松沢 哲郎, born 1950), Japanese primatologist
- Yuki Matsuzawa (born 1960), Japanese classical pianist
- Yumi Matsuzawa (松澤 由美, born 1974), Japanese singer
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