Blatch is a surname occasionally used as a given name. Notable people called Blatch include:
Emily Blatch, Baroness Blatch (1937–2005), British politician Harriot Stanton Blatch (1856–1940), American writer and suffragist Helen Blatch (1933–2015), British actress, mostly seen on television James Blatch Piggott Dennis (1815–1861), English paleontologist and natural historian Margaret Blatch (1886–1963), English chef, restaurateur, and cookbook writer Nora Stanton Blatch Barney (1883–1971), American civil engineer, architect, and suffragist Peter Blatch (born 1953) William Gabriel Blatch (1840–1900), British entomologist