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 skier
Katsuei Hirasawa (平沢 勝栄) (born 1945), Japanese politician
Maia Hirasawa (born 1980), Swedish singer-songwriter
Masanori Hirasawa (平沢 正規), Japanese astronomer
Mitsuhide Hirasawa (平澤 光秀) (born 1982), Japanese professional wrestler
Rinako Hirasawa (平沢 里菜子) (born 1983), Japanese pornographic actress
Sadamichi Hirasawa (平沢 貞通) (1892–1987), Japanese tempera painter
Shusaku Hirasawa (平沢 周策) (born 1949), Japanese footballer
Susumu Hirasawa (平沢 進) (born 1954), Japanese progressive-electronic musician and composer
