Aizawa (相沢 "fellow swamp") is a Japanese surname. Alternate writings include 相澤 ("fellow swamp"), 藍澤 ("indigo swamp") and 藍沢 ("indigo swamp"). Notable people with the surname include:

, Japanese woman who killed her father , Japanese manga artist , retired Japanese ski jumper , Japanese gravure idol and race queen , Japanese voice actress , Japanese engineer , Japanese badminton player , Japanese voice actress and singer , Japanese women's footballer , Japanese actress and gravure idol , Japanese soldier who assassinated Tetsuzan Nagata , Japanese model and television personality , Japanese composer, creator , Japanese baseball player , Japanese scholar, author of the New Theses, promoter of Japanese national essentialism

Fictional characters , a character in Dai Sentai Goggle V , a character in the anime series Absolute Boy Chitose Aizawa, a character in the 3rd game of the dating sim series Tokimeki Memorial , a character in the manga series Ai Yori Aoshi , a character in the manga series Tomo-chan Is a Girl! Itsuki Aizawa, a character in the manga series Warriors of Tao , a character in the manga series The Knight in the Area , a character in the manga series G-Taste , a character in the manga series Wangan Midnight Kenji Aizawa, a character in the film Tokyo Drifter , a character in the manga series Nabari no Ou , a character in the manga Girl Got Game Miki Aizawa, a character in the film Jushin Thunder Liger: Fist of Thunder , a character in the manga series Tokyo Mew Mew , a character in the manga series Great Teacher Onizuka Orie Aizawa, a character in the manga series Epotoransu! Mai , a character in the light novel series Suki na Mono wa Suki Dakara Shōganai! , a character in the manga series Mahoraba , a character in the visual novel Soul Link , a character in the manga series Figure 17 , a character in the manga series My Hero Academia , a character in the manga series Death Note , a character in the manga series Gravitation , a character in the manga series Tomo-chan Is a Girl! , a character in the dating sim Welcome to Pia Carrot , a character in the visual novel Kanon Yuri Aizawa, a character in the J-drama Pride