Hach is a surname. Notable people with the surname include:
Heather Hach, American screenwriter, librettist and novelist Hans Hach Verdugo (born 1989), Mexican tennis player Irv Hach (1873–1936), American baseball player Kathryn Hach-Darrow (born 1922), American businesswoman Phila Hach (1926–2015), American chef