Yoshizawa (written: 吉沢, 吉澤 or 芳沢) is a Japanese surname. Notable people with the surname include:

• Akie Yoshizawa (吉沢 秋絵, born 1968), Japanese idol, singer and actress
• Akiho Yoshizawa (吉沢 明歩, born 1984), Japanese gravure idol and AV actress
• Akira Yoshizawa (吉澤 章, 1911–2005), Japanese origamist
• Yoshizawa Ayame (吉沢 菖蒲), stage name for several kabuki actors
• Hideo Yoshizawa (吉沢 秀雄), Japanese video game designer
• Hideo Yoshizawa (footballer) (吉澤 英生, born 1971), Japanese footballer and manager
• Hiroshi Yoshizawa (吉沢 広司, 1931–2013), Japanese ski jumper
• Hisae Yoshizawa (吉澤 久恵, born 1966), Japanese football referee
• Hitomi Yoshizawa (吉澤 ひとみ, born 1985), Japanese idol, singer and actress
• Ichiro Yoshizawa (吉沢 一郎, 1903–1998), Japanese mountain climber
• Jumpei Yoshizawa (吉澤 純平, born 1985), Japanese speed skater
• Ken Yoshizawa (吉澤 賢, born 1978), Japanese hurdler
• Kenkichi Yoshizawa (芳沢 謙吉, 1874–1965), Japanese diplomat
• Masakazu Yoshizawa (吉沢 政和, 1950-2007), Japanese-American musician
• Motoharu Yoshizawa (吉沢 元治, 1931–1998), Japanese musician
• Ryo Yoshizawa (吉沢 亮, born 1994), Japanese actor
• Sarii Yoshizawa (吉沢 さりぃ, born 1985), Japanese gravure idol
• Shogo Yoshizawa (吉澤 正悟, born 1986), Japanese footballer
• Yuya Yoshizawa (吉澤 佑哉, born 1986), Japanese footballer