Iwasaki (岩崎 or 岩﨑, "rock peninsula") is a Japanese surname. Notable people with the surname include:

• Akiko Iwasaki (岩崎 明子, born 1970), Japanese immunobiologist
• Akira Iwasaki (岩崎 昶, 1903–1981), Japanese film critic and producer
• Carl Iwasaki (born 1961), American college baseball coach
• Chihiro Iwasaki (岩崎 知弘, 1918–1974), Japanese illustrator
• Emiko Iwasaki (岩崎 恵美子, born 1976), Japanese video game artist
• Fukuzo Iwasaki (岩崎 福三, 1925–2012), Japanese real estate magnate and chairman of Iwasaki Sangyo Group
• Hidenori Iwasaki (岩崎 英則, born 1971), Japanese video game music composer
• Hiromi Iwasaki (岩崎 宏美, born 1958), Japanese singer
• Hiroshi Iwasaki (岩崎 ひろし, born 1953), Japanese actor and voice actor
• Kaori Iwasaki (岩崎 香, born 1969), Japanese swimmer
• Kazusa Iwasaki [ja] (岩﨑 知瑳, born 1995), Japanese footballer
• Kyoko Iwasaki (岩崎 恭子, born 1978), former breaststroke swimmer
• Makoto Iwasaki (岩崎 誠, born 1964), Japanese engineer
• Masami Iwasaki (岩崎 征実, born 1971), Japanese voice actor
• Minako Iwasaki (岩崎 美奈子, born 1975), Japanese illustrator, game character designer and manga artist
• Mineko Iwasaki (岩崎峰子, 岩崎究香), Retired geiko (geisha)
• Pablo Larios Iwasaki, Mexican football goalkeeper
• Sebastian Iwasaki, Polish figure skater
• Shigeru Iwasaki (岩崎 茂, born 1953), Japanese general
• Shinichi Iwasaki (岩崎伸一, born 1968), Japanese ice hockey player
• Shun-ichi Iwasaki (岩崎 俊一, born 1926), Japanese engineer, researcher, winner of the Japan Prize in 2010
• Taisho Iwasaki (岩﨑 大昇, born 2002), the member of Japanese boy group, Bishounen, and actor
• Takizo Iwasaki (岩崎 瀧三, 1895–1965), Japanese businessman
• Taku Iwasaki (岩崎 琢, born 1968), Japanese composer
• Takuji Iwasaki (岩崎 卓爾, 1869–1937), Japanese meteorologist, biologist, ethnologist historian
• Takuya Iwasaki (岩崎 卓也, 1929–2018), Japanese archaeologist
• Tomás Iwasaki, Peruvian football forward
• Toshihiko Iwasaki (岩崎 利彦, born 1967), Japanese hurdler
• Iwasaki Tsunemasa (岩崎 常正, 1786–1842), Japanese botanist, zoologist and entomologist
• Iwasaki Yanosuke (岩崎 彌之助, 1851–1908), Japanese banker, businessman, investor, and politician
• Iwasaki Yatarō (岩崎 弥太郎, 1835–1885), founder of Mitsubishi
• Yohei Iwasaki (岩﨑 陽平, born 1987), Japanese footballer
• Yoshimi Iwasaki (岩崎 良美, born 1961), Japanese singer

• Minami Iwasaki of Lucky Star
• Ryuji Iwasaki of Tokumei Sentai Go-Busters
• Rio Iwasaki of Persona 3 Portable

• Iwatsu Electric, a Japanese electronics company
• Ishizaki