Hirasawa (written: 平澤 or 平沢) is a Japanese surname. Notable people with the surname include:
Gaku Hirasawa (平澤 岳) (born 1973), Japanese alpine skierKatsuei Hirasawa (平沢 勝栄) (born 1945), Japanese politicianMaia Hirasawa (born 1980), Swedish singer-songwriterMasanori Hirasawa (平沢 正規), Japanese astronomerMitsuhide Hirasawa (平澤 光秀) (born 1982), Japanese professional wrestlerRinako Hirasawa (平沢 里菜子) (born 1983), Japanese pornographic actressSadamichi Hirasawa (平沢 貞通) (1892–1987), Japanese tempera painterShusaku Hirasawa (平沢 周策) (born 1949), Japanese footballerSusumu Hirasawa (平沢 進) (born 1954), Japanese progressive-electronic musician and composer